Which pair of body systems control and coordinate the cells that make up the organism?
a. nervous and endocrine
b. digestive and circulatory
c. reproductive and muscular
d. respiratory and excretory

5) these are organisms where the genetic material is not bound by a nucleus. they are usually unicellular.

Microorganisms aren’t all decomposers; in fact, many act as producers or primary consumers in an ecosystem. how do microorganisms that act as producers benefit the rest of an ecosystem in terms of energy transfer? what about microorganisms that act as primary consumers?

What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones