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20080110 1716

What happens during respiration? a.Oxygen is released into the air. b.Glucose is broken down, releasing energy. c.Carbohydrates are released into the bloodstream. d.Water and carbon dioxide are converted into energy.

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20080110 1716

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  1. What happens during respiration?a.Oxygen is released into the air.b.Glucose is broken down, releasing energy.c.Carbohydrates are released into the bloodstream.d.Water and carbon dioxide are converted into energy.

  2. How are photosynthesis and respiration related?a.They have opposite equations.b.They have the same equation.c.They both produce carbon dioxide.d.They both produce oxygen.

  3. Respiration and photosynthesis keep the levels of carbon dioxide and oxygen in the atmospherea.fairly constant.b.constantly changing.c.constantly increasing.d.constantly decreasing.

  4. Almost all of the oxygen in our atmosphere has been produced bya.heterotrophs.b.autotrophs.c.single-celled animals.d.multicellular animals.

  5. Each rung of the DNA ladder is made ofa.a single nitrogen base.b.a pair of nitrogen bases.c.three nitrogen bases.d.four nitrogen bases.

  6. During DNA replication, adenine (A) always pairs witha.guanine (G).b.cytosine (C).c.thymine (T).d.adenine (A).

  7. A characteristic that an animal has that helps it survive in the environment and reproduce is called a(n)a.trait.b.adaptation.c.gene.d.tropism.

  8. An organism's habitat must provide all of the following EXCEPTa.food.b.water.c.predators.d.shelter.

  9. To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide, anda.soil.b.salt.c.water.d.bacteria.

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