In bacterial communities, where resources are often limited, survival requires the ability to sense, respond to, and cooperate or compete with neighboring organisms. a. True
b. False

Explanation:

True.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

✿   this landform has a high elevation and a high relief

✿   this landform is a mountain