Photosynthesis and Respiration

A fruit fly is classified as a heterotroph, rather than as an autotroph, because it is unable to

• transport needed materials through the body

• release energy from organic molecules

• manufacture its own food

• divide its cells mitotically

A bean plant is an autotroph because it

• uses enzymes

• uses oxygen

• converts inorganic materials into organic nutrients

• absorbs organic nutrients from the soil

By which process are CO₂ and H₂O converted to carbohydrates?

• transpiration

• respiration

• fermentation

• photosynthesis

Photosynthesis transforms molecules of water and carbon dioxide into molecules of

• carbohydrate and oxygen

• carbohydrate and nitrogen

• polypeptide and oxygen

• polypeptide and nitrogen

Which gas is excreted as a waste product of autotrophic nutrition in maple trees?

• nitrogen

• oxygen

• carbon dioxide

• methane

One immediate cause of a decrease in the rate of photosynthesis is a reduction in the availability of

• carbon dioxide

• carbon monoxide

• hydrogen

• nitrogen

Which process is directly used by autotrophs to store energy in glucose?

• diffusion

• photosynthesis

• respiration

• active transport

The green aquatic plant represented in the diagram was exposed to light for several hours. Which gas would most likely be found in the greatest amount in the bubbles?

• oxygen

• nitrogen

• ozone

• carbon dioxide

An experimental setup is shown in the diagram. Which hypothesis would most likely be tested using this setup?

• Light is needed for the process of reproduction.

• Glucose is not synthesized by plants in the dark.

• Protein synthesis takes place in leaves

• Plants need fertilizers for proper growth.

The equation below represents a summary of a biological process.

carbon dioxide + water glucose + water + oxygen

This process is completed in

• mitochondria

• ribosomes

• cell membranes

• chloroplasts