Question

question 10 (10 points)
what does the term ectotherm mean?

a) their metabolism maintains a warm, constant body temperature.

b) they have a spine.

c) they do not have a spine.

d) they must obtain heat from the environment.

Explanation:

Ectotherms are organisms that rely on external environmental sources to regulate their body temperature. Option a describes endotherms (warm - blooded animals). Options b and c are about having a spine (related to vertebrates and invertebrates), which is not relevant to the definition of ectotherm. Option d correctly states that they must obtain heat from the environment.

Answer:

d) They must obtain heat from the environment.