Bacteria perform each of the following ecological roles. which role typically does not involve a symbiosis?
a) skin commensalist
b) decomposer
c) aggregates with methane-consuming archaea
d) gut mutualist
e) pathogen

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.

What is one energy transformation that is taking place in the photo? radiant energy to thermal energy thermal energy to nuclear energy chemical energy to thermal energy radiant energy to chemical energy

Which event would lead to primary succession of a forest?