Life Science

There is a connection between photosynthesis and cellular respiration. The products from one provide the raw materials for the other. This image shows the relationship between the two processes.What products of photosynthesis are starting material for cellular respiration?

• Glucose and oxygen

• Heat energy and ATP

• Carbon dioxide and water

• Light energy and chlorophyll

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Green plants produce their own food during photosynthesis. This image shows the process

of photosynthesis.

Which of these substances is also a product of photosynthesis?

• carbon dioxide

• chlorophyll

• oxygen

• water

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Plants perform photosynthesis and respiration. Dead plants are broken down and become part of the soil. Which of the following matter do plants help to cycle through ecosystems?

• carbon only

• carbon and oxygen only

• carbon, oxygen, and nitrogen only

• carbon, oxygen, nitrogen, and water

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Kristine exercises regularly. The process of cellular respiration makes it possible for Kristine to run on the treadmill and to lift weights. What do her cells do during cellular respiration?

• Convert kinetic energy into chemical energy

• Absorb light energy through the chlorophyll in their chloroplasts

• Combine water and carbon dioxide to produce oxygen and glucose

• Break down food molecules to release energy in the form of ATP

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The left side of your brain controls the _______ side of your body.

• Right

• Left

• Front

• Back

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There is a relationship between breathing and cellular respiration. Breathing involves taking in oxygen and releasing carbon dioxide. How does the oxygen affect the process of cellular respiration?

• Oxygen and ATP combine to produce energy in the form of carbon dioxide.

• Oxygen and glucose combine to produce energy in the form of ATP molecules

• Oxygen and hydrogen combine to produce energy in the form of ATP molecules.

• Oxygen and carbon dioxide combine to produce energy in the form of ATP molecules.

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An alligator lives in a swamp with deer, birds, fish, trees, and other plants. The alligator eats a bird that eats the seeds and plants. What is the original source of the energy that the alligator gets from eating the bird?

• the flowing water in the swamp

• the energy that the bird creates

• the sunlight that the plants absorb

• the heat from the air in the swamp

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Carbon exists in many forms on Earth. The diagram below shows part of the carbon cycle.

Based on evidence in the diagram, what is happening in Step 1?

• Animals are releasing energy into the environment and storing carbon.

• Animals are decomposing and releasing carbon into the soil.

• Animals are converting carbon dioxide from the atmosphere to oxygen.

• Animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.

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One of the largest cypress trees in Florida has a tree trunk with a diameter of about 3.5 m. What is the source of most of the carbon in the cypress tree’s trunk?

• The carbon dioxide molecules the tree absorbed from the atmosphere.

• The carbon created by the tree during photosynthesis

• The carbon stored in tree seeds.

• The nutrients containing carbon that the tree absorbed from the soil.

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A freshwater marsh is a type of ecosystem. Grasses, fish, wading birds, frogs, and alligators live together in freshwater marshes. Pieces of decaying material sink to the bottom of the marsh. In which of these places can carbon be found in the marsh?

• in the atmosphere and water only

• In living things only

• In living things and decaying materials

• n the atmosphere, water, living things, and decaying materials

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