Revision Sheet
Quarter 1
2014-2015
Department: - Science
Name: -Mrs.Dalia
Grade:-7
Choose the letter of the best answer.
1. Which of the following scenarios describes an example of extinction?
A. Water pollution kills off all the fish that live in a small pond.
B. Every individual in a species of wolf is killed by hunters or lack of food.
C. The cutting down of a tree forces a bird to build a new nest in another tree.
D. A population of deer must move to a new forest when its original habitat is destroyed by fire.
2. The diagram below shows a portion of the fossil record in sedimentary rock. Different rock layers and
fossils are clearly visible.
Which of these statements is true of the fossils and rock layers shown in the diagram?
A. Layer B contains the second-oldest fossils.
B. Layer A contains the most recently formed fossils.
C. The fossils in layer B are older than those in layer D.
D. The fossils in layer D are the most recently formed.
3. What is artificial selection?
A. the process by which humans breed organisms for certain characteristics
B. the process by which inherited traits in a population change over generations
C. the process by which Charles Darwin noted the differences among finches on the Galápagos Islands
D. the process in which individuals better adapted to their environment are more likely to survive and
reproduce
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Which of these scenarios is an example of natural selection?
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A. Farmers crossbreed two types of cows to produce a breed of cow that has high-quality beef and can
tolerate a hot climate.
B. Giraffes having longer necks survive a dry season by eating leaves from the tops of trees. Those
giraffes breed more successfully that year.
C. Dogs of the same breed and having a desirable coat color are bred with one another to produce
more puppies with that same coat color.
D. People kill rattlesnakes that rattle when approached by humans, but people do not kill rattlesnakes
that remain silent. The quiet snakes survive and breed
5. The table below shows characteristics of different types of organisms or particles.
Number of Cells
Type of
Reproduction
Living or Nonliving
A
1
needs host; lytic
cycle
nonliving
B
1
binary fission or
conjugation
living
Which type of organism or particle is described in row B?
A. viruses
B. bacteria
C. ribosomes
D. genetic material
6. What part of a plant’s leaves allows the plant to take in carbon dioxide and release oxygen?
A. stem
B. cuticle
C. stomata
D. chloroplasts
7. Snakes have traces of leg like structures that are not used for movement. Which of the following could
you infer from this evidence?
A. Snakes do not have ancestors.
B. Snakes are an example of transitional fossils.
C. Snakes share a common ancestor with animals that have legs.
D. Snakes and animals that have legs are part of the same species.
8. Which response below best describes fusion of gametes during sexual reproduction of protists?
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A. one gametes splits into two cells
B. two gametes each divide to form four cells
C. one gamete doubles its genetic information
D. two gametes join together to share genetic information
9. Tara is comparing the embryos of parrotfish and salamanders. Although the adult organisms look very
different, the embryos follow similar developmental pathways. What does this suggest?
A. that parrotfish and salamanders are found in the fossil record
B. that parrotfish and salamanders have the same genetic makeup
C. that parrotfish and salamanders likely share a common ancestor
D. that parrotfish and salamanders use their organs for different functions
10. How do some bacteria survive harsh conditions?
A. They attach to a host cell.
B. They change environments.
C. They cannot survive harsh conditions.
D. They encase some parts in an endospore.
11. The image below shows one structure of fungi.
What is shown in the above image, and how is it important for the sexual reproduction of fungi?
A. It shows cyanobacteria. During sexual reproduction, this structure produces genetic material.
B. It shows hyphae. They join with the hyphae of another fungus to share genetic material.
C. It shows yeast. Yeast helps fungi obtain the food needed to fuel sexual reproduction.
D. It shows spores. Spores are used only for asexual reproduction and are not needed for sexual
reproduction in fungi.
12. Which of the following identifies the levels of classification in correct order?
A. domain, kingdom, phylum, class, order, family, genus, species
B. genus, species, domain, kingdom, phylum, class, order, family
C. domain, kingdom, genus, species, phylum, class, order, family
D. genus, species, phylum, class, order, family, domain, kingdom
13 .Which of the following best explains why many plants experience dormancy?
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A. longer days
B. more rainfall
C. shorter nights
D. less direct sunlight
14. How are viruses harmful to host cells?
A. They use a host cell for food.
B. They are not harmful to host cells.
C. They destroy the host cell while replicating.
D. They replace a host cell nucleus with the virus nucleus.
15. Which of the following is a characteristic of fungi?
A. absorb nutrients from the environment
B. obtain nutrients by eating other animals
C. make nutrients using energy from the sun
D. make nutrients using particles in the atmosphere
16. The diagram below shows one type of living organism.
How does the organism shown above obtain nutrients to fuel life processes?
A. It creates its own food.
B. It eats other organisms.
C. It absorbs nutrients from the air.
D. It breaks down the nutrients in dead organisms.
17. Algae are considered what type of protist?
A. plantlike
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B. animal-like
C. fungus-like
D. they are not considered a protist
18 The following diagram shows a plant.
What structural feature is missing from the above diagram, and what is one of its functions?
A. roots; absorb sunlight
B. roots; supply plants with water
C. stems; store extra food
D. stems; hold the plant upright
19. Which of the following is an example of an external stimulus that could cause a plant to grow larger?
A. wilting
B. the presence of a predator
C. abundant sunlight and water
D. extremely dry and hot conditions
20. Two species might have similar skeletal structures that have different functions. What do these types of
structures suggest about the relationship between the two species?
A. Common structures with different functions suggest that the species live in the same habitat.
B. Common structures with different functions suggest that the species do not share a common
ancestor.
C. Common structures with different functions suggest that one of the species never learned how to
use the structure properly.
D. Common structures with different functions suggest that the species share a common ancestor that
also had a similar structure.
21. How did photosynthesizing prokaryotes that lived during Precambrian time help life on Earth become
more diverse?
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A. They reproduced quickly.
B. They became other organisms.
C. They made conditions more favorable by enriching the soil.
D. They made conditions more favorable by increasing the amount of oxygen.
22. Some living things are able to tolerate life in hot springs. To which of the following domains would these
organisms most likely belong?
A. Archaea
B. Protista
C. Eukarya
D. Bacteria
23 Which dating method determines a fossil’s age by comparing it to other fossils?
A. fossil record
B. relative dating
C. absolute dating
D. radioactive dating
24. Similarities in the structures of two different species provide evidence that the species evolved from a
common ancestor. This type of evidence includes similar structures that have different functions. Which
of the following pairs of features have a similar structure but have a different function in each organism?
A. a dolphin fin and a shark fin
B. human fingernails and monkey fingernails
C. the front leg of a cat and the wing of a bat
D. the wing of a bumble bee and the wing of a bird
25. What is a population?
A. a group of organisms that can mate to produce fertile offspring
B. a group of organisms of the same species that live in a defined geographical area
C. a process by which inherited traits in a population change over many generations
D. a process in which better-adapted individuals are more likely to survive and reproduce
26. The illustration below shows the changes over time in a population of mice in the wild after a population
of hawks has moved into the grassy fields where they live. The white and dark mice differ only in color.
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Which of the following terms would best be used to describe the 3 steps shown in this diagram?
A. variation
B. selection
C. overproduction
D. selective breeding
27. During photosynthesis, what two things do plants use to produce glucose?
A. water and chlorophyll
B. light energy and oxygen
C. chlorophyll and carbon dioxide
D. light energy and carbon dioxide
28. The image below shows one structure of fungi.
The image shows part of the fungal body known as the mycelium. What makes up the mycelium?
A. spores
B. yeasts
C. hyphae
D. cyanobacterium
29. The following chart describes several different parts of flowering plants.
A
B
C
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male reproductive
structure
female reproductive
structure
composed of sepals
and petals
Which of the answers below gives the correct labels for columns A, B, and C?
A. A is pistil, B is stamen, C is flower
B. A is stamen, B is pistil, C is flower
C. A is angiosperm, B is flower, C is fruit
D. A is stamen, B is seed, C is gymnosperm
30. With which organisms do fungi partner to produce lichen and mycorrhizae?
A. with hyphae to produce lichen, with yeast to produce mycorrhizae
B. with phytoplankton to produce lichen, with spores to produce mycorrhizae
C. with plant roots to produce lichen, with cyanobacteria to produce mycorrhizae
D. with cyanobacteria to produce lichen, with plant roots to produce mycorrhizae
31. Which of the following scenarios could cause stomata to close?
A. The plant lives near a wetland area.
B. The soil around the plant is very wet.
C. The soil around the plant is very dry.
D. Rain has fallen every day for ten days.
32. What happens to gametes during sexual reproduction of protists?
A. fusion
B. fission
C. division
D. production of spores
35. What material do plants make during photosynthesis?
A. glucose
B. organelles
C. chlorophyll
D. carbon dioxide
36. The diagram below shows viruses and a host cell.
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In what way are host cells important to viruses?
A. Viruses use host cells for food.
B. Viruses need host cells to replicate.
C. Viruses travel to new locations with the help of host cells.
D. Viruses do not need host cells, but host cells do need viruses to reproduce.
37. A scientist is studying extreme environments like deep sea vents and hot springs. What type of life
should she expect to find in these environments?
A. virus
B. archaea
C. bacteria
D. eukaryotes
38.The following diagram shows a type of fungus.
What feature indicates that this is a club fungus, as opposed to any other
type of fungus?
A. It is unicellular.
B. It has a microscopic sac-like shape.
C. It is a mushroom, and mushrooms belong to the club fungi.
D. It has a zygote stage enclosed within a tough capsule.
39. How do prokaryotes differ from eukaryotes?
A. Prokaryotes have a nucleus, while eukaryotes do not.
B. There is no difference between the two types of cells.
C. Prokaryotes are always multicellular, while eukaryotes are always
single celled.
D. Prokaryotes are always single celled, while eukaryotes can be single-celled or multicellular.
40. The following chart describes several different parts of flowering plants.
A
B
C
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male
reproductive
structure
female reproductive
structure
composed of sepals
and petals
What is the correct label for column A?
A. seed
B. pistil
C. stamen
D. angiosperm
41. What are two results of partnerships between fungi and other organisms?
A. yeast and spores
B. hyphae and mycelium
C. lichen and mycorrhizae
D. cyanobacteria and phytoplankton
42. Which of the following is a function of stomata?
A. absorb sunlight
B. release glucose
C. release water vapor
D. absorb water through the roots
Answer the following questions in the space provided.
1. Describe three different types of evidence that scientists use to support the theory of evolution.
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2. Are viruses living or nonliving? Give at least three reasons to explain your answer.
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3.Describe three ways that bacteria exchange their DNA.
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4. Write the 8 levels of classification .
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5- Write some organisms that can be used for artificial selection .
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6- What are the structures that protists can use for movement?
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7- Give one example of each of the following
a- single celled protist ..................................
b- single celled fungi .....................................
c- multicellular protist...................................
d- multicellular fungi.....................................
e- plant like protist.........................................
f- animal like protist.......................................
g-fungi like protist.........................................
8- What do plants need for photosynthesis?
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9.Describe two ways protists reproduce asexually.
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