a secondary, and often unintended, product of a process

a waste gas produced during cellular respiration.

the basic unit of life

a molecule that absorbs red and blue light and reflects green light

the process of breaking down food into nutrients that can be used by cells

the organs and structures that digest food.

the organs and structures that digest food.

the state of being dormant or at rest

the tube connecting the mouth and the stomach

an organism that lacks chlorophyll and gets nutrients from dead or living organisms

the part of the digestive system between the small intestine and the rectum where water is removed from the solid waste

the process that occurs when an organism uses nutrients for energy and produces waste products

a chemical in food that helps keep an organism alive and active

a process used by plants and algae to make sugar (food) out of light, carbon dioxide, and water

the part of the digestive system between the stomach and large intestine, where nutrients are absorbed from digested food

the organ where food is reduced to mush by acid and muscle activity

the nutrient that cells use for energy

no longer of use, excess

a single-celled fungus