AP BIOLOGY

Detailed explanation-1: -Most living things need oxygen to survive. Oxygen helps organisms grow, reproduce, and turn food into energy. Humans get the oxygen they need by breathing through their nose and mouth into their lungs. Oxygen gives our cells the ability to break down food in order to get the energy we need to survive.

Detailed explanation-2: -Small pores called stomata-singular, stoma-are found on the surface of leaves in most plants, and they let carbon dioxide diffuse into the mesophyll layer and oxygen diffuse out.

Detailed explanation-3: -Almost all living things, including humans, need oxygen to survive. Both plants and animals take in oxygen from their surroundings to release energy.

Detailed explanation-4: -All plants need oxygen for their survival because without oxygen plants cannot perform cellular respiration. During photosynthesis, oxygen is released as a byproduct and also plants intake oxygen from the atmosphere through stomata and lenticels. Was this answer helpful?