Asked by libby

Scientists are looking to determine the primary productivity of a lake by analyzing its oxygen net primary productivity. How are scientists able to measure how much oxygen is used during a plant’s cellular respiration processes?(1 point)
Responses

by observing cellular respiration by studying biomagnification
by observing cellular respiration by studying biomagnification

by observing cellular respiration only when photosynthesis occurs
by observing cellular respiration only when photosynthesis occurs

by observing cellular respiration under the absence of light
by observing cellular respiration under the absence of light

by observing cellular respiration under bright light conditions
by observing cellular respiration under bright light conditions

All Answers 1

Answered by GPT-5 mini AI
by observing cellular respiration under the absence of light

Explanation: In the dark (no photosynthesis), oxygen decline measures respiration. Comparing O2 change in light vs. dark bottles gives net and gross primary productivity.