Which of these is returned to the atmosphere when plants transpire? O oxygen
O carbon
water
O nitrogen
Question 7

Oxygen

Explanation:

It's the cycle at which plants and animals breathe. Plants take on carbon dioxide from animals and breathe out oxygen which animals take in and breathe out carbon dioxide and so the cycle continues. N.B. By animals I also mean humans because we are higher animals but still under the classification of animals.

haploid cells;

because the light is a great source of energy for the plants to survive. (i hope this )