Name:_ANSWER KEY
Course: SCIENCE
Date:__________________
Advisory:_____________2026
Tri-1 Exam Study Guide
xylem
grow
pistil
cotyledon
anther
energy
dead
transpiration
root
organism
response
photosynthesis
dormant
germination
nonliving
gas exchange
stigma
seed
water
embryo
Fill in the blanks using the words above.
1. The first structure to grow out of the seed is the______ROOTS_________________.
2. An organism that is no longer alive is _________DEAD.
3. The ______COTYLEDON contains food for the baby plant.
4. Organisms are alive but inactive when they are DORMANT______________.
5. Water moves through a plant in small tubes called _______XYLEM_____.
6. A ___RESPONSE______________ is an action or change is behavior, usually caused by a
stimulus, or change in the environment.
7. A function that all living organisms do is ___GROW___________.
8. GERMINATION_______is the start of growth and development of a seed.
9. When we breathe in oxygen and breathe out carbon dioxide it is called ______________
_GAS EXCHANGE_____.
10. The process of water moving through a plant is _____TRANSPIRATION___________.
11. Any living thing is called ___________ORGANISM________.
TRI 1- CTA Study Guide 1
12. _____WATER___ and _ENERGY_________ are two needs of every living organism.
13. The main parts of a seed are the seed coat, the ___EMBRYO__ (or baby plant), and the
cotyledon.
14. Something that was never alive is called ____NON-LIVING_________.
15. A young plant in a dormant state, which contains the embryo and cotyledon, is a
___SEED__________.
16. The __ANTHER_______ is the top part of the stamen where pollen is made.
17. The _PISTIL______ is the female part of the flower and contains the
__STIGMA_____________ and ovary.
18. The process by which leaves of plants use the energy from light to make food from carbon
dioxide and water is __PHOTOSYNTHESIS______________.
19. Order the following from smallest to largest based on their biological organization.
organ
cell
Cell structure
organism
organ system
tissue
Smallest: _______________________________________cell structurea________________
_______________________________________cell
_______________________________________tissue
________________________________________________organ
Largest:
_______________________________________organ system
________________________________________________organism
TRI 1- CTA Study Guide 2
20. List the 7 characteristics that all organisms have in common.
Needs
Functions
ENERGY
GROWTH
WATER
REPRODUCTION
GAS EXCHANGE
WASTE ELIMINATION
RESPOND TO THE ENVIRONMENT
21. Complete the chart to identify the similarities and differences between these cells.
Paramecium
Elodea

SINGLE-CELLED ORGANISM


PROTIST CELL

CAN LIVE ON IT’S OWN

CANNOT LIVE ON ITS OWN

EATS OTHER ORGANISMS FOR ENERGY

PLANT CELL

HAS A CELL WALL

USES PHOTOSYNTHESIS FOR FOOD
PART OF A MULTICELLULAR ORGANISM (A
PLANT)

BOTH ARE ONE CELL

NEED WATER TO SURVIVE

CAN BE SEEN USING A MICROSCOPE

EUKARYOTIC CELLS-CONTAIN A NUCLEUS AND COMPLEX ORGANELLES

HAVE A CELL MEMBRANE
TRI 1- CTA Study Guide 3
22. What is the difference between a cell and a microorganism? A CELL IS NOT ALWAYS
AN ORGANISM, IT CAN BE A SINGLE-CELLED ORGANISM OR PART OF A
MULTICELLULAR ORGANISM. A MICROORGANISM IS A MICROSCOPIC ORGANISM
THAT DISPLAYS ALL OF THE CHARACTERISTICS OF LIFE AND ARE SINGLED-CELLED
ORGANISMS THAT CAN LIVE ON THEIR OWN. AN EXAMPLE OF MICROBES ARE
BACTERIA SUCH AS E.COLI AND A PARAMECIUM.
23. Draw a picture of the process of germination.
Label the plant parts.
24. What is pollination? POLLINATION IS HOW A PLANT SEXUALLY REPRODUCES.
POLLINATION OCCURS WHEN POLLEN IS TRANSFERRED FROM THE ANTHER (MALE
PART) OF A PLANT TO A STIGMA (FEMALE PART) OF A PLANT.
TRI 1- CTA Study Guide 4
25. How are bacteria and fungi cells similar? Different? Explain. BACTERIAL CELLS ARE
MICROSCOPIC SINGLE-CELLED ORGANISMS THAT ARE PROKARYOTES. PROKARYOTIC
CELLS ARE SIMPLE CELLS THAT DO NOT HAVE A NUCLEUS OR ORGANELLES. THEY
INSTEAD HAVE SIMPLE CELL STRUCTURES. BACTERIA IS ALSO ITS OWN DOMAIN.
FUNGAL CELLS CAN BE EITHER SINGLED-CELLED ORGANISMS (SUCH AS YEAST) OR
PART OF A MULTICELLULAR ORGANISM (A MUSHROOM). FUNGAL CELLS ARE
EUKARYOTIC CELLS THAT CONTAIN COMPLEX CELL STRUCTURES IN ADDITION TO A
NUCLEUS. FUNGAL CELLS THAT ARE PART OF A MULTICELLULAR ORGANISM HAVE
TUNNELS CONNECTING THEM WHICH MAKES IT POSSIBLE FOR A FUNGAL CELL TO
HAVE MORE THAN ONE NUCLEUS.
TRI 1- CTA Study Guide 5
26. Draw a picture of the path that water takes when it enters a plant. Label your picture.
What is this process called? TRANSPIRATION. SEE IMAGE OF 27. THIS IS WHAT YOU NEED TO
DRAW.
a.WATER VAPOR EXITS THE
PLANT THROUGH THE OPEN
STOMATA WHICH ARE IN THE
LEAVES
27. Label the diagram
b. THE GUARD CELLS SWELL
WITH WATER AND OPEN THE
STOMATA
c. WATER TRAVELS
UP THROUGH THE
XYLEM TO EVERY
CELL IN THE PLANT
d. WATER ENTERS THE PLANT THROUGH
THE ROOTS FROM THE SOIL
TRI 1- CTA Study Guide 6
28. Fill in the blanks.
Complexity
TRI 1- CTA Study Guide 7
29. What is a habitat? What do you need to consider when creating a habitat? _ A HABITAT
IS A SPECIFIC PLACE WHERE AN ORGANISM LIVES. WHEN CREATING A HABITAT YOU
NEED TO CONSIDER AIR (GASES), WATER, FOOD (NUTRIENTS), AND WASTE. YOU ALSO
SHOULD CONSIDER SHELTER AND TEMPERATURE. AN ORGANISM NEEDS TO BE ABLE TO
FULFILL THE 7 CHARACTERISTICS OF LIFE IN THEIR HABITAT.
30. What are the functions of the following cell structures? What type of cell contain those
structures?
Nucleus:___ NUCLEI ARE IN EUKARYOTIC CELLS. THEY DETERMINE THE NATURE OF
MATERIALS & ORGANELLES IN THE CELL. THEY ALSO CONTAIN THE CELLS DNA
Chloroplast:_ CONTAINS CHLOROPHYLL WHICH IS RESPONSIBLE FOR PHOTOSYNTHESIS.
THEY ARE FOUND IN PLANT CELLS AND SOME PROTIST CELLS.
Endoplastic Reticulum:__HELPS WITH CELL STRUCTURE, ASSEMBLES & TRANSPORTS
PROTEIN IN CELLS.
31. List the 3 Domains of Life. How are they similar/different? Give an example of an
organism from each domain. THE THREE DOMAINS ARE BACTERIA, ARCHAEA, AND
EUKARYOTA. BACTERIAL AND ARCHAEAN CELLS ARE IDENTICAL UNTIL YOU LOOK AT
THEM ON A MOLECULAR LEVEL. ARCHAEAN CELL STRUCTURES ARE MADE WITH
DIFFERENT MOLECULES THAT ENABLE THEM TO LIVE IN EXTREME ENVIRONMENTS, AN
EXAMPLE WOULD BE A THERMOPHILE WHICH CAN SURVIVE EXTREME HEAT. BACTERIA
AND ARCHAEA ARE BOTH SINGLE-CELLED ORGANISMS MADE OF PROKARYOTIC CELLS.
AN EXAMPLE OF A EUKARYOTE FROM THE EUKARYOTIC DOMAIN ARE HUMANS,
ANIMALS, AND FUNGI. EUKARYOTES HAVE COMPLEX CELLS THAT CONTAIN A NUCLEUS.
EUKARYOTES CAN EITHER BE A SINGLE-CELLED ORGANISM OR A MULTICELLULAR
ORGANISM. AN EXAMPLE OF A BACTERIA WOULD BE E.COLI OR STEP (BOTH CAN MAKE
YOU SICK)
32. What features are common to all insects? Describe their function. ALL INSECTS HAVE
THE FOLLOWING FEATURES IN COMMON: EXOSKELETON WHICH PROTECTS THE
INTERNAL ORGANS, ANCHORS THE MUSCLES, AND KEEPS THE INSECT FROM DRYING
OUT; SEGMENTED BODIES (HEAD, THORAX, ABDOMEN); 3 PAIRS OF JOINTED LEGS FOR
MOVEMENT; SIMPLE & COMPOUND EYES FOR SIGHT.
33. What is bacteria? List the positives and negative impact that bacteria can have. Where
do you find bacteria? (ANSWER BELOW)
34. What are fungi? Where would you find fungi? What is the job of fungi? BACTERIA AND
FUNGI ARE BOTH DECOMPOSERS THAT ARE FOUND EVERYWHERE. BACTERIA CAN HELP
MAKE FOOD SUCH AS YOGURT OR CHEESE. BACTERIA CAN ALSO BE USED IN MEDICINE
AND ARE FOUND IN YOUR STOMACH. FUNGI BREAK DOWN DEAD ORGANISMS IN THE
ENVIRONM
TRI 1- CTA Study Guide 8
TRI 1- CTA Study Guide 9