Question

a biologist designs an experiment using single - celled algae as shown in the diagram. setup placed near window setup placed in closet test tube bubbles water funnel algae water funnel algae what question can the biologist answer using this experimental setup? a. do algae need water in the absence of light? b. do algae obtain nutrients from the water? c. do algae use water to reproduce? d. do algae produce a gas in the presence of light?

Explanation:

The experiment has two set - ups, one with light (near window) and one without light (in closet). Bubbles are being collected in the test - tube in the light setup. This indicates that the biologist is likely testing if algae produce a gas in the presence of light. The other options about water need in absence of light, nutrient uptake from water, and water use in reproduction are not being tested by this setup as the main variable being manipulated is light presence/absence and the main observation is gas production (bubbles).

Answer:

D. Do algae produce a gas in the presence of light?