Question

1. Which of the following best describes trade-offs of ectothermy versus endothermy?

1. Ectotherms can allocate more resources (Energy) to body growth, but also must expend more resources maintaining body temperature; the opposite is true for endotherms.
2. Endotherms struggle to maintain quick muscle action in cooler environments as compared to ectotherms.
3. Ectotherms generally maintain a more constant internal temperature than do endotherms.
4. None of the above is correct

2. As a zoology student, you have been comparing vertebrate and invertebrate excretory systems. From this comparison, you conclude that

1. both filter body fluids and then reabsorb water and solutes
2. both use a tubule system to process the filtrate
3. the morphological similarities represent common origin
4. None of the above is correct

Answer 1

Question 1

Ectothermic animals are those whose who depend on external haet sources to maintain their body temperature. Therefore, ectotherms animals have to use more resources to maintain their body temperature. On the other hand, endothermic animals are those who use internally generated heat to maintain their constant body temperature. Hence, option a is correct.

Question 2

Both invertebrates and vertebrates , excretory system have tubule system to process the filterate. However, the tubule system of invertebrates were very simple and that of vertebrates have complex. Hence, option b is correct.