Answer:
B
Explanation:
Mutualism is a relationship between two species in which both species benefit. Certain species of bacteria in your intestines form a mutualistic relationship with you.
An organism that exhibits a head with sensory equipment and a brain probably also have receptors, which capture the stimuli of the environment and transform them into a nervous impulse, and organs of the senses that are the communication channels we have with the environment and thanks to them we understand and interpret the environment, they are: vision, hearing, smell, taste, and touch.
Number 4 is not part of the cell theory
It is probably the type of environment they live in
There are a few vital characteristics to mention here. First we have to know about which ions we're talking about as the cellular membrane is semi-permeable (lets some flow freely through the membrane and some not), it depends on the size of the compounds, and also the charge that a molecule has.
