What is population density? a. the area occupied by a particular species in an ecosystem b. the number of organisms of a species in a particular area c. the total number of organisms within a fixed area d. the total number of organisms of a particular species

The answer is:

B) The number of organisms of a species in a particular area.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

the fossil record provides evidence of a common ancestor to many species.