WIS Ecology Benchmark #1 Review

Use the model to answer the following question: Which is the best explanation of the change in energy shown in the model?

• New energy is produced by plants during photosynthesis.

• Large amounts of energy are released into the environment during photosynthesis.

• Energy from sunlight is destroyed as it powers photosynthesis.

• Energy input from the environment is stored in food molecules during photosynthesis.

Answer explanation

Blue and Yellow are incorrect because energy cannot be created or destroyed. Teal is incorrect because photosynthesis does not release energy.

In recent decades, average global temperatures have increased significantly. Scientists agree that the widespread destruction of the Amazon rain forest contributes to climate change. Which mechanism might be used to support that hypothesis?

• Deforestation causes water on the ground to reflect sunlight.

• Deforestation reduces the number of plants able to absorb carbon dioxide.

• Photosynthesis produces energy, which gives off heat.

• Plants use up energy during cellular respiration.

Answer explanation

Blue is incorrect because photosynthesis is unrelated to reflection of light by water. Yellow and Red are incorrect because photosynthesis is a process that changes energy from one form to another, but it does not produce energy.

A disease that destroys all the chloroplasts in a plant has been found in a plant population near your school. What would be the effect of this disease?

• Nothing would happen. The plants would be fine.

• The plant couldn't absorb light energy or conduct photosynthesis. Without photosynthesis, the plant would die.

• Without chloroplasts the plant would be able to increase it's rate of growth by double

Answer explanation

Teal is correct because chloroplasts are the plant cell organelles that convert light energy into chemical energy via the photosynthetic process. Without chloroplasts, a plant could not absorb light energy.

True or False: Chloroplasts are the location of photosynthesis.

• True

• False

True or False: Sucrose (sugar) molecules break down during cellular respiration.

• True

• False

True or false: Water is a product of cellular respiration.

• True

• False

Cellular respiration is the process in which organisms break down food to release _____.

• energy

• nutrients

• sugar

• oxygen

Where does cellular respiration occur?

• Chloroplasts

• Stems

• Leaves

• Mitochondria

• Stoma

Which organisms use cellular respiration as a way to convert energy into usable form?

• seedless plants only

• only photosynthetic organisms

• only mammals

• all organisms

Photosynthesis is the process in which plants use energy from light to produce _____.

• new cells

• organelles

• food

• none of these answers