The is the total number of organisms that an ecosystem can support.. a.. tolerance range. b.. carrying capacity. c.. competitive exclusion principle. d.. population.

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi