Ohio Biology Air Test

Which of the following best describes an ecosystem?

• A collection of plants and animals

• A community of living organisms in conjunction with the nonliving components of their environment, interacting as a system

• A group of interacting animals

• A single species and its natural habitat

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How can the wolf in this picture benefit from plants even if it never eats plants?

• The rabbit eats the plants, and the wolf eats the rabbit.

• The plants help the rabbit to hide from the wolf.

• The plants make the wolf run slower.

• The rabbit eats the wolf, and the grass decomposes the rabbit.

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According to the food web, if the snail population of this ecosystem increases, which of the following is most likely to occur?

• The grass population will increase.

• The grass population will decrease.

• The snails will eventually become extinct.

• The grasshopper population will increase at nearly the same rate.

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What is the relationship between the Sun, plants, and animals in a food web?

• The Sun provides energy for both plants and animals to make their own food.

• The Sun provides energy for plants to make their own food, and animals eat plants or other animals.

• The Sun provides light so animals can see which plants to eat.

• The Sun provides heat energy for animals to survive, but not plants.

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Which of the following best explains why many trees in cold environments have short, pointy leaves?

• Shorter leaves can better tolerate strong winds and are less likely to blow off trees than large, broad leaves.

• Animals in colder environments are not adapted to eat any other kind of leaf.

• The cold prevents the leaves from growing longer and broader.

• Short, pointy leaves do not become weighed down by snow, so the trees' limbs are less likely to break.

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Which of the following best describes the process of photosynthesis?

• A) The conversion of solar energy into chemical energy by plants

• B) The breakdown of glucose into energy in animal cells

• C) The absorption of nutrients from the soil by plant roots

• D) The exchange of gases between plants and the atmosphere

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What is the primary function of the mitochondria in a cell?

• A) To store genetic information

• B) To produce energy in the form of ATP

• C) To synthesize proteins

• D) To regulate cell division

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Which of the following is a characteristic of a prokaryotic cell?

• A) Presence of a nucleus

• B) Lack of membrane-bound organelles

• C) Presence of mitochondria

• D) Larger than eukaryotic cells

In an experiment, a student measures the growth of plants under different light conditions. What is the independent variable in this experiment?

• A) The type of plant

• B) The amount of water given

• C) The light conditions

• D) The growth of the plants

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Which of the following best explains the role of decomposers in an ecosystem?

• A) They produce energy for the ecosystem

• B) They break down dead organisms and recycle nutrients

• C) They compete with plants for sunlight

• D) They provide food for primary consumers

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