Question

Which is an example of a response to a stimulus?














A.

the presence of allergens in the air











B.

loss of water from the body as a result of excess sweating











C.

the thick fur on an animal to protect it from cold weather











D.

an increasing heart rate when blood oxygen levels drop

Answer 1

D

Answer 2

Remoras are small fish that attach themselves to the sides of sharks. They get protection and scraps of food from the sharks. The sharks are neither benefited nor harmed by the remora.



Which term describes the relationship between the shark and the remora?














A.

competition











B.

commensalism











C.

parasitism











D.

mutualism

Answer 3

@Lena772

Answer 4

What places are likely to support a large producer population?














A.

regions with few consumers











B.

areas with abundant water and sunlight











C.

ecosystems with many decomposers











D.

regions where there is no rainfall