Name _______________________________
Unit 1 Review Sheet
1.1 Branches of Science
o biology
o zoology
o botany
o taxonomy
o entomology
o herpetology
o mammalogy
o ornithology
 6 themes of biology
o cell
 unicellular
 multicellular
 DNA
o homeostasis
o reproduction/ inheritance/ gene
 asexual
 sexual
o evolution
 natural selection
 adaptation
o interdependence
 ecology
 ecosystem
o need for energy
 photosynthesis
 autotrophs
 heterotrophs
Per. ______
1.2 Characteristics of Life
 cell organization
 metabolism
 cell division
 development
1.3 Scientific Method
 problem
 research
 hypothesis
 experiment
 observation
 conclusion
 communicating
1.4 Microscopy and Measurement
 Janssen Brothers
 Leeuwenhoek
 light microscope
o parts of microscope (diagram &
use)
o magnification calculations
o resolution
o diameter of field
o inversion of image
o micrometers
 measuring size of object
 electron microscopes
o TEM
o SEM
 ultra centrifuge
 chromatography
 electrophoresis
 computers
1
Unit 1
The Science of Life

first life arose on earth 3.5 billion years ago
1-1 Study of life = BIOLOGY


content so vast that specialties have been developed:
o
botany study of plants
o
zoology study of animals
o
anatomy study of plant and animal parts
o
taxonomy study of classification
o
cytology study of cells
o
genetics study of genetics, heredity & DNA
o
physiology study of how things work
o
entomology study of insects
o
herpetology study of amphibians and reptiles
o
mammalogy study of mammals
o
ornithology study of birds
other sciences important to biology:
= chemistry and physics
2
botany/ anatomy
herpetology
cytology
genetics
ornithology
entomology
Biology unified by six themes:
1. Cell Structure and Function

all organisms are made of cells

the cell is the basic unit of life
unicellular = one cell
multicellular= many cells

all surrounded by a membrane and enclosing genetic material (DNA)
2. Stability and Homeostasis

all living things maintain a stable internal environment (= homeostasis)
o
stimulus = anything that causes an organism to react
o
response = reaction to the stimulus
3. Reproduction and Inheritance
reproduction= production of new offspring
DNA= nucleic acid, double helix shaped
gene= segment of DNA, unit of hereditary info

all transmit hereditary information
asexual reproduction= one parent, without egg or sperm
sexual reproduction= two parents, combination of egg & sperm
4. Evolution

describes changes in populations of organisms over time
natural selection= favorable variations reproduce faster
adaptation= increases an organism’s chance at survival
5. Interdependence of Organisms

interactions of organisms with each other and their environment
ecology= study of relationship between organisms & their environment
ecosystems= biotic (living) & abiotic (non-living) component of environment
6. Matter, Energy and Organization
 organisms require constant supply of energy, the origin of which is the sun
photosynthesis= light energy converted to chemical energy
autotrophs= make their own food
heterotrophs= need to obtain food
3
Regents Questions:
1. The arrows in the diagram below indicate the
movement of materials into and out of a singlecelled organism.
4. The diagram below represents possible
evolutionary relationships between groups of
organisms.
The movements indicated by all the arrows are
directly involved in
(1) the maintenance of homeostasis
(2) photosynthesis, only
(3) excretion, only
(4) the digestion of minerals
2. Which process usually results in offspring that
exhibit new genetic variations?
Which statement is a valid conclusion that can
be drawn from the diagram?
(1) Snails appeared on Earth before corals.
(2) Sponges were the last new species to
appear on Earth.
(3) Earthworms and sea stars have a common
ancestor.
(4) Insects are more complex than mammals.
5. The diagram below represents a food web.
3. A food web is represented in the diagram below.
Which population in this food web would most likely
be negatively affected by an increase in the mouse
population?
(1) snake
(3) wolf
(2) rabbit
(4) hawk
4
Two of the herbivores represented in this food
web are
(1) toads and snakes
(2) deer and mice
(3) wolves and raccoons
(4) grasshoppers and toads
1-2 Characteristics of Life
cells

all living things composed of cells

all living things are highly organized at the cell and molecular level

all living things use energy
tissues
organs
metabolism= sum of all chemical processes in living things

all living things maintain stable internal environments
organ system
homeostasis= stable internal environment

organism
all living things grow
cell division= making more number of cells
development= process by which organisms grow

all species of organisms can reproduce
Which term best describes each image?
1.
cell division
2.
tissue
development
3.
homeostasis
5
Regents Questions:
1. Normally, when the concentration of glucose in the blood falls below a certain level, stored glucose
reenters the blood until the original concentration is reached again. This regulation of the concentration
of blood glucose is part of the process known as
(1) synthesis
(3) pinocytosis
(2) respiration
(4) homeostasis
2. The addition of new cells and corresponding increase in organism size is known as
(1) growth
(3) regulation
(2) transport
(4) respiration
3. Which term is defined as all the chemical reactions that are required to sustain life?
(1) metabolism
(3) nutrition
(2) regulation
(4) synthesis
4. The ability of the human body to maintain a constant body temperature is an example of
(1) transport
(3) homeostasis
(2) metabolism
(4) synthesis
5. Cells are to tissues as organs are to (cells  tissues  organs  organ systems  organism)
(1) organ systems
(2) cells
(3) genes
(4) organelles
6. A biologist would most likely study all of the chemical activities of an organism to obtain information
about the organism’s
(1) number of mutations
(3) development
(2) reproductive cycle
(4) metabolism
7. Which sequence is listed in order from simplest to most complex?
(1) tissue  cell  organ system  organ
(2) cell  tissue  organ  organ system
(3) cell  tissue  organism  organ
(4) organism  tissue  organ  organ system
6
1-3 Scientific Methods

many forms, but most similar:
1. define problem/ ask question
2. collect data
= observing, measuring, sampling, organizing data
3. form hypothesis
= suggested explanation that is testable
predicting= an educated guess
4. experimenting
= testing a hypothesis by gathering data under controlled conditions
control group= serves as a comparison
experimental group= the condition varied
single variable= independent variable/ dependent variable
5. drawing conclusions
what you change/ what you measure

producing a model explanation supported by data

inference= a conclusion based on facts rather than direct observations
6. communicating

report research results (where?)

hypothesis continuously supported by research is termed a theory
7
Name: ______________________________________
Critical Thinking / Problem Solving Activity:
Per. _________
Can you Spot the Scientific Method?
Each sentence below describes a step in the scientific method. Math each sentence with a step of the
scientific method listed below:
A. recognize a problem
C. test the hypothesis with an experiment
B. form a hypothesis
D. draw conclusions
__B__ 1. Stephen predicted that seeds would start to grow faster if an electric current traveled
through the soil in which they were planned.
__B__ 2. Susan said, “If I fertilize my geranium plants, then they will blossom.”
__D__ 3. Jonathan’s data showed that household cockroaches moved away from raw cucumber slices.
__C__ 4. Rene grew bacteria from the mouth on special plates in the laboratory. She placed drops of
different mouthwashes on bacteria on each plate.
__C__ 5. Kathy used a survey to determine how many of her classmates were left-handed and how many
were right-handed.
__A__ 6. Dana wanted to know how synthetic fibers were different from natural fibers.
__A__ 7. Jose saw bats catching insects after dark. He asked, “How do bats find the insects in the
dark?”
__A__ 8. Justin wondered if dyes could be taken out of plant leaves, flowers, and stems.
__C__ 9. Jenny soaked six different kinds of seeds in water for 24 hours. Then she planted the seeds
in soil to a depth of 1cm. She used the same amount of water, light, and heat for each kind of
seed.
__A__10. Bob read about growing plants in water. He wanted to know how plants could grow without soil.
__B__11. Kevin said, “If I grow five seedlings in red light, I think the plants will grow faster than the
five plants grown in white light.”
__D__12. Angela’s experiment proved that earthworms moved away from light.
__B__13. Scott said, “If acid rain affects plants in a particular lake, it might affect small animals, such
as crayfish, that live in the same water.”
__D__14. Mike fed different diets to three groups of guinea pigs. His experiment showed that guinea
pigs need vitamin C and protein in their diets.
__D__15. Kim’s experiment showed that chicken eggshells were stronger when she gave the hen feed to
which extra calcium had been added.
8
Name: _________________________________________
The Scientific Method
Put the following steps of the scientific method in the proper order.
Per. _______
__6___ Organize and analyze data
__3___ State a hypothesis
__1___ Identify the problem
__7___ State conclusion
__4___ Design and carry out an experiment
__5___ Make observations and record data
__2___ Gather information
Math the term in Column I with its definition in Column II.
Column I
1. theory
___F___
2. law
___G___
3. hypothesis
___A___
4. experiment
___B___
5. variable
___C___
6. control
___E___
7. data
___D__
8. conclusion
___I___
9. application
___H___
Column II
a. suggested explanation to a problem or
observation based upon known
information
b. used to test a hypothesis
c. anything that can affect the results of an
experiment
d. observations and measurements made
during an experiment
e. part within the experiment that is
maintained without change in order to
provide a comparison for the part of the
experiment containing the variable
f. Hypothesis that has been tested and
supported by a great amount of evidence
over a long period of time
g. Statement describing (but not explaining)
a natural event or phenomenon
h. New use to which results are put or new
technique developed
i. A summary that explains whether or not
the data support the hypothesis
Regents Questions:
9
1. An experiment was performed to determine the effect of different mineral salts on plant growth.
Forty pots containing genetically identical plants were divided into four equal groups and placed in a welllighted greenhouse. Each pot contained an equal amount of non-mineral potting soil and one plant.
Minerals were then added in equal amounts to each experimental group of pots as shown below.
For the experiment to be valid, what should be added to the control group of pots?
(1) water
(3) potassium salts
(2) nitrogen salts
(4) potassium and phosphorus salts
2. The diagram below illustrates the result of growing a garlic bulb in a cup of distilled water over five
days.
Design an experiment consisting of a control and three different experimental groups to test the
prediction, “Garlic grows better as the salt concentration of the solution in which it is grown increases.”
In your answer, be sure to:
• describe the control to be used in the experiment [1]
• describe the difference between the three experimental groups [1]
• state one type of measurement that should be made to determine if the prediction is accurate [1]
• describe one example of experimental results that would support the prediction [1]
__*garlic in water with no salt__________________________________________________________________
__*different amount of salt in water___________________________________________________________
__*leaf length, root length______________________________________________________________________
__*the garlic bulb grown with the most amount of salt had the longest leaves; the garlic
grown with the most amount of salt had the longest roots____________________________________
__________________________________________________________________________________________________
__________________________________________________________________________________________________
10
3. In an investigation designed to determine the effect of the amount of water on plant growth, two
groups of equal-sized bean plants of the same species were grown under identical conditions, except for
the amount of water they were given. One group was watered with 200 milliliters of water once a day,
while the other group was watered with 400 milliliters of water once a day. After several days, the
heights of the plants were measured. It was determined that the plants watered with 400 milliliters of
water once a day showed more growth.
The variable in this investigation is the __amount of water__________________.
4. A new drug for the treatment of asthma is tested on 100 people. The people are evenly divided into
two groups. One group is given the drug, and the other group is given a glucose pill.
The group that is given the glucose pill serves as the __control___________________.
The group that is given the drug serves as the ___experimental__________________.
5. A student is designing a procedure to determine the effect of the absence of a specific amino acid in
the nutrient culture medium of a certain species of bacteria. Using one of more complete sentences,
describe the control that the student should use in the experiment.
__bacteria grown in a nutrient culture medium WITH the amino
acids_____________________________________________________________________________________________
__________________________________________________________________________________________________
6. You are the head of the research division of the Leafy Lettuce Company. Your company is
experimenting with growing lettuce using hydroponic technology. Hydroponic technology involves growing
plants in containers of growth solution in a greenhouse. No soil is used. The growth solution that the
company uses contains water, nitrogen, and phosphorus. The company wants to know if adding iron to this
formula will improve lettuce growth.
Briefly describe how to test the effect of the formula with iron added. In your description, be sure to:
a)
b)
c)
d)
State a hypothesis to be tested in the new experiment
State how the control group will be treated differently from the experimental group.
Identify two factors that must be kept the same in both the experimental and control groups.
State what types of data should be collected to support or refute the hypothesis.
a) If I add iron to the growth solution, then lettuce will grow better.
b) Control will not have iron added to the growth solution, the experimental group will have
iron added to the growth solution.
c) Same species of lettuce; same growth solution of water, nitrogen, and phosphorus; same
amount of light; same amount of days; etc.
d) height of lettuce; width of lettuce; growth rate; number of leaves; etc. (Do NOT write
“growth”... you have to be able to measure.
11
__A_ 7. Which condition is necessary for an experiment to yield useful data?
(a) similar results should be obtained when the experiment if repeated
(b) only the expected results should be considered each time experiment is performed
(c) the hypothesis is correct
(d) the experimental period must be short
_A__ 8. An organism was kept at a temperature of 40 oC for a period of 2 weeks. At the end of that
time, the investigator determined that the organism was sterile. To support the hypothesis that
high temperatures cause sterility, the investigator should be able to show that the
(a) organism was not sterile before the experimental period began
(b) high temperature did not alter the blood pressure of the organism
(c) pituitary gland, which controls sterility, of the organism had not degenerated
(d) organism was homozygous for temperature sensitivity
__C_ 9. A nutrient medium was prepared by mixing powdered agar with boiling distilled water. Some of
the prepared medium was then placed in a sterile petri dish, covered, and allowed to solidify. The
cover was then removed and the agar was touched to a door knob. The petri dish was covered
again and incubated at 37 oC. After 48 hours, bacterial growth was observed. The investigator
concluded that bacteria on doorknobs cause disease. One error was that the investigator
(a) used distilled water
(b) covered the petri dish
(c) did not show that bacteria caused disease
(d) did not incubate the materials at the proper temperature
__B_ 10. A student conducted an original, well-designed experiment, carefully following proper scientific
procedure. In order for the conclusions to become generally accepted, the experiment must
(a) contain several experimental variables
(b) be repeated to verify the reliability of the data
(c) support the original hypothesis
(d) be conducted by a scientist
_D_ 11. In a controlled experiment, 20 marigold plants of the same age were grown singly in 20 different
pots containing soil of the same composition and moisture level. The pots were divided into two
groups of 10. One group was exposed to 8 hours of sunlight each day for 15 days, and the other
group was exposed to 8 hours of light from a 75-watt bulb for the same period. In this
investigation, the source of light represents the experimental
(a) problem
12
(b) control
(c) hypothesis
(d) variable
_D__ 12. Which experimental procedure would best determine the effectiveness of a vaccine for
preventing a certain disease in pigeons?
(a) Expose 100 pigeons to the disease and then inoculate all 100 pigeons with the vaccine.
(b) Expose 100 pigeons to the disease and then inoculate 50 of these pigeons for this disease.
(c) Inoculate 10 pigeons with the vaccine and 90 pigeons with a harmless solution and then expose
all 100 pigeons to the disease.
(d) Inoculate 50 pigeons with the vaccine and 50 pigeons with a harmless solution and then expose
all 100 pigeons to the disease.
A student conducting an experiment placed five geranium plants of equal size in environmental chambers.
Growing conditions were the same for each plant except that each chamber was illuminated by a
different color of light of the same intensity. At the end of 20 days, plant growth was measured.
13. Using one or more complete sentences, state a possible hypothesis for this experiment.
__If I grow a plant under red light, then the plant will grow faster. ________________________
__________________________________________________________________________________________________
__________________________________________________________________________________________________
14. Using one or more complete sentences, state the control that should be used in this experiment.
__Geranium plants grown under sunlight.________________________________________________________
__________________________________________________________________________________________________
__________________________________________________________________________________________________
A sterile petri dish, A, containing sterile nutrient agar was exposed to the air
for a few minutes. A second sterile petri dish, B, containing sterile nutrient
agar was not opened. Both petri dishes were placed in a warm, dark place. Three
days later, petri dish A was observed to contain a population of bacteria, which
petri dish B had no bacterial growth.
15. Using one or more complete sentences, explain how petri dish B serves as a control for the
experiment.
__Petri dish B was not opened, meaning the bacteria did not grow from the agar. _________
_________________________________________________________________________________________________
_________________________________________________________________________________________________
16. Using one or more complete sentences, state a hypothesis that this experiment could have been
testing using petri dish B as the control.
__If I open a petri dish, then bacteria will grow.___________________________________________
________________________________________________________________________________________________
________________________________________________________________________________________________
13
17. A scientist performed an experiment using the following steps:
Define and
research the
problem
X
Set up and
Make
conduct the
observations
experiment once
and record data
Formulate a
conclusion
Repeat the
experiment
Using one or more complete sentences, identify the step that belongs in box X.
__state a hypothesis. __________________________________________________________________________
Base your answers to questions 18 through 20 on the information and diagram below.
An investigation was carried out using the two setups shown below. Other than the difference shown in
the diagram, all other conditions were identical.
18. State one possible hypothesis that could be tested using these setups.
__If I decrease the temperature, then plants will grow taller.______________________________
_________________________________________________________________________________________________
_________________________________________________________________________________________________
19. What data should be collected in order to test the hypothesis stated in question 18?
__Height of plant_______________________________________________________________________________
_________________________________________________________________________________________________
_________________________________________________________________________________________________
20. Describe one change that could be made in the investigation to improve it.
__Increase the temperature difference; _____________________________________________________
Use more plants for each setting (More sample size, more validity.)________________________
_________________________________________________________________________________________________
14
1-4 Microscopy and Measurement
Microscopes
 1590 Janssen Brothers
o first compound microscope
 van Leeuwenhoek
o fish tail capillaries
o “wee beasties” in fresh water (initial study of microbiology)





our compound microscopes are called _______light____________ microscopes
parts of microscope (diagram sheet) and their functions
o lenses:
1. eyepiece lens: 10x
2. objective lenses:
very low:
5x (total= _50x___)
low:
10x (total= _100x___)
high:
43x (total= __430x__)
oil:
97x (total= __970x__)
light microscopes limited to 2000x
why? __wavelength of light_____________________________________________________________
resolution drops with increase in magnification
resolution= __detail of image___________________________________________________________
unit of measure = μ micron (SI unit of length measurement)
= 0.000001m
1 millimeter = 1,000 microns 2mm=2000 μm; 4.5mm=4500 μm; 65 μm= 0.065mm
TEM’s: Transmission Electron Microscopes



use electrons in place of ____light__________
focus with magnets
electron beam passes through thin section of object (therefore not alive)

magnifies 200,000x: photo enlarged 5x: total= __1,000,000x_______
(no resolution problems)
SEM’s: Scanning Electron Microscopes
 shows surface of object in 3D
 allows very ___high_______ magnification
Other Tools of the Biologist
Ultra Centrifuge
ex. separating blood or urine samples
ex. separating cell components
 based on __density___________
Chromatography
 paper
 column
Electrophoresis
 gel
Computers
 data management
15
Name: ____________________________________
Microscope
Label the parts of the microscope.
Per. ________
7.
1.
coarse adjustment knob
2.
fine adjustment knob
ocular/ eyepiece
8.
body tube
9.
arm
3.
stage clips
4.
10.
low power objective
11.
high power objective
12.
5.
(inclination joint)
13.
6.
base
16
nosepiece
14.
stage
diaphragm
light source
Regents Questions:
1. The four wells represented in the diagram were
each injected with fragments that were prepared
from DNA samples using identical techniques.
2. A laboratory technique is illustrated in the
diagram below.
This laboratory procedure is known as
(1) cloning
(2) gel electrophoresis
(3) chromatography
(4) use of a dichotomous key
This technique is used to
(1) determine volume
(2) separate molecules in a mixture
(3) measure length
(4) analyze data from an experiment
3. DNA electrophoresis is used to study evolutionary relationships of species. The diagram below shows
the results of DNA electrophoresis for four different animal species.
Which species has the most DNA in common with species A?
(1) X and Y, only
(3) Z, only
(2) Y, only
(4) X, Y, and Z
17
Microscope Questions:
1. A wet-mount slide preparation of a thread viewed in the low-power field (100x) of a compound light
microscope is shown in diagram A below. Diagram B shows the field of view as it appeared when the
objective was switched to high power.
Which statement best explains why the thread is not visible in diagram B?
____The specimen was not centered. _________________________________________________________
2. The diagram below shows an amoeba moving out of the high-power field of view of a compound
microscope in the direction indicated by the arrow.
What should be done to center the amoeba in the field of view and focus it sharply?
__Move the slide to the right __________________________________________________________________
__Focus using the fine adjustment._____________________________________________________________
3. The size of the image of a cell being examined with a microscope is determined by
(a) light source and fine adjustment
(c) objectives and ocular
(b) stage and stage clips
(d) diaphragm and coarse adjustment
4. The diagram below represents a hydra as viewed with a compound microscope.
If the hydra moves toward the right of the slide preparation, which diagram best represents what will
be observed through the microscope?
18
5. The diagram below represents two cells next to a metric measuring device under the low power
objective of a compound light microscope.
What is the approximate length of a nucleus of one of these cells?
(a) 100m
(b) 500 m
(c) 1,000m
(d) 1,500 m
Use the diagram below to answer questions 6 and 7.
6. What is the lowest possible magnification that can be obtained using the microscope shown below?
_____20 x 10 = 200x___________________________________________________________
7. A student observes 12 onion epidermal cells along the diameter of the low power field. How many of
these cells would the student observe along the diameter of the high power field? Explain.
____low power: 200x; high power: 800x… high power magnifies images 4x than low power.
____12 / 4 = 3 cells ___________________________________________________________
______________________________________________________________________________
8. To locate a specimen on a prepared slide with a compound microscope, why should a student begin with
the low power objective instead of the high power objective?
___greater field of view. ________________________________________________________
19
9. Explain how the light intensity in the high power field of view of a compound microscope may be
increased?
__use the diaphragm_________________________________________________________
10. Each division of the metric ruler shown in the diagram below equals 1 millimeter.
The diameter of the field of vision is approximately
(a) 2,800m
(b) 3,700m
(c) 4,400m
(d) 4,700m
11. The diagram below represents cells in a microscopic field of view with a diameter of 1.5 mm.
What is the approximate length of a single cell? Show calculations.
__1.5/3 = 0.5mm OR 1.5mm = 1500 μm… 1500/3 = 500 μm __________________________
Base your answers to questions 12 and 13 on the diagram of the single celled organism observed by a
student using the low power objective of a microscope.
12. How should the student should move the slide on the stage to center the organism in the field?
(a) away from herself and to her right
(c) toward herself and to her right
(b) away from herself and to her left
(d) toward herself and to her left
13. As the student observes the organism under the high power objective, the organism swims out of
focus. To bring it back into focus, the student should
(a) open the diaphragm
(c) turn the ocular
(b) turn the fine adjustment
(d) adjust the light source
20
14. The coarse adjustment of a compound light microscope should be used to
(a) focus the image of a specimen under the low power objective
(b) focus the image of a specimen under the high power objective
(c) increase the light intensity passing through a specimen
(d) measure the diameter of the high power field
15. A compound light microscope has a 5x ocular and a 10x low power objective. Calculate the total
magnification that is obtained using this low power objective.
____5 x 10 = 50x______________________________________________________________
16. The ocular of a compound light microscope has a magnification of 10x, and the low power objective
and high power objective lenses have magnifications of 10x and 30x, respectively. If the diameter of the
low power field measures 1,500 micrometers, the diameter of the high power field will measure
(a) 100m
(b) 300m
(c) 500m
(d) 4,500m
17. During the preparation of a wet mount, a student dropped a plastic cover slip directly on top of the
drop of water containing the specimen. This slide preparation technique most probably
(a) caused the cover slip to shatter
(b) crushed the specimen
(c) trapped air bubbles under the cover slip
(d) scratched the surface of the slide
18. The threads of different colors, one blue, one green and one red, were placed on a slide so they
crossed over one another. The red thread was placed on the bottom, the green one in the middle and the
blue on top. The area where the threads crossed was then viewed using the high power objective. Only
the blue thread was clearly visible. Describe one adjustment that could be made to obtain a clear image
of only the red thread in this field of view.
___Use the fine adjustment
knob._________________________________________________________________________
Base your answers to 19 and 20 on the diagram below.
19. After part 3 is turned, which part must often be adjusted? _____2_____________
20. Which part must be adjusted to enable the viewer to continually observe a paramecium swimming at
changing levels in a wet mount under high power?________ 2_____________
21
Unit 1 Crossword
Use the terms from Unit 1 to complete the puzzle.
Across
1.
study of the classification of living
things
Down
2. lenses attached to revolving nosepiece
4.
3. information collected during an
experiment
6.
type of reproduction employed by bacteria
and protozoans
5. the unit of structure and function in
this adjustment is used on low power only
living things
8. ___ power is the shortest objective
lens on the microscope
7.
10. changes in organisms through time
11. a _____cellular organism has many cells
performing different functions
12. number of parents required for sexual
reproduction
17. an organism having a single cell that
carries out all life functions
19. unit of meausre; same as micrometer
21. all chemical processes that maintain life
in an organism
22. provides the energy for life on earth
detail of visible image under microscope
9. another name for the eypiece lens
13. this adjustment is used under high power
14. controls amount of light passing through
specimen
15. a green ___ is an example of an
autotroph
16. a possible solution to a problem; "educated
guess"
24. number of parents necessary for asexual 18. discovered "wee beasties"
reproduction
20. type of microscope that has more than one
25. type of electron microscope that
lens
requires thin sections
23. holds slide on stage
26. electron microscope that shows 3D image 28. longest objective lense with highest
of surface
magnification
27. deoxyribonucleic acid; part of
chromosomes
28. the ability of an organism to maintain
balance or "steady state"
22
Name: __look at the key on teacher website___
Per. _____
Unit 1 Crossword
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