Question

how do photosynthesis and cellular respiration contribute to the cycling of carbon among earths systems? select two correct answers. a. plants convert carbon from the atmosphere to sugars through photosynthesis. b. cellular respiration uses oxygen from the atmosphere to produce energy and carbon dioxide. c. plants remove oxygen from the atmosphere and convert it into carbon through photosynthesis. d. cellular respiration converts carbon dioxide from the atmosphere into oxygen to produce energy. e. plants remove carbon from the atmosphere through photosynthesis and animals eat it and convert it into oxygen.

Explanation:

Photosynthesis is the process by which plants use carbon - dioxide from the atmosphere and convert it into sugars, storing carbon. Cellular respiration is the process where organisms use oxygen to break down organic matter and release carbon - dioxide back into the atmosphere. Option A is correct as plants indeed convert carbon from the atmosphere to sugars through photosynthesis. Option B is correct as cellular respiration uses oxygen to produce energy and carbon - dioxide. Option C is incorrect because plants take in carbon - dioxide and release oxygen during photosynthesis. Option D is incorrect as cellular respiration uses oxygen and releases carbon - dioxide, not the other way around. Option E is incorrect as animals do not convert the carbon they consume into oxygen; they use oxygen in cellular respiration and release carbon - dioxide.

Answer:

A. Plants convert carbon from the atmosphere to sugars through photosynthesis.
B. Cellular respiration uses oxygen from the atmosphere to produce energy and carbon dioxide.