Question

chapter 12 mastery test a
part a write the letter of the answer that correctly completes each sentence.

1. during cellular respiration, organisms produce

a oxygen b nitrogen c carbon dioxide d carbon

1. the less energy available to a population, the

a larger b smaller c weaker d stronger

1. all plants and animals depend on energy from the

a ocean b biosphere c sun d biome

1. eat only plants.

a carnivores b omnivores c producers d herbivores

1. organisms that make their own food are called

a consumers b producers c condensers d decomposers
part b match the terms in column a with the descriptions in column b. write the letter of the correct answer on the line.
column a column b

1. biome a different populations living in one place
2. habitat b how water becomes water vapor
3. community c a place where an organism lives
4. ecosystem d an ecosystem found over a large geographic area
5. population e interaction among groups of organisms with the nonliving environment
6. nitrogen fixation f no longer having any organisms alive on earth
7. biosphere g material added to the environment that harms liv
8. evaporate h how bacteria change nitrogen into forms plants c
9. pollution i the part of earth where life can exist
10. extinct j a group of organisms of the same species that liv the same area

Explanation:

1. During cellular respiration, organisms consume oxygen and produce carbon - dioxide.
2. Limited energy restricts population growth, so a smaller amount of available energy leads to a smaller population.
3. The Sun is the primary source of energy for plants and animals through processes like photosynthesis.
4. Herbivores are animals that eat only plants.
5. Producers, such as plants, make their own food through photosynthesis.
6. A biome is an ecosystem found over a large geographic area.
7. A habitat is a place where an organism lives.
8. A community is different populations living in one place.
9. An ecosystem is the interaction among groups of organisms with the non - living environment.
10. A population is a group of organisms of the same species that live in the same area.
11. Nitrogen fixation is how bacteria change nitrogen into forms plants can use.
12. The biosphere is the part of Earth where life can exist.
13. Evaporation is how water becomes water vapor.
14. Pollution is material added to the environment that harms living things.
15. Extinct means no longer having any organisms alive on Earth.

Answer:

1. C
2. B
3. C
4. D
5. B
6. D
7. C
8. A
9. E
10. J
11. H
12. I
13. B
14. G
15. F