BIO 204 Final Exam
1. Although having evolved independently, the tracheal tubes of mammals
and insects are both supported by rigid tissues. The trachea of a mammal is
supported by cartilage, and the tracheae of an insect are supported by chitin.
What selective pressure most likely led to the convergent evolution of these
respiratory structures?: When air is the respiratory medium, there is a greater risk that the tracheal tubes
will collapse.
2. Organisms with a circulating body fluid that is distinct from the fluid that
directly surrounds the body's cells are likely to have .: a closed circulatory system
3. Which of the following is a result of gastrulation in animals?
I) The archenteron is formed.
II) The body axes are established.
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, III) The germ layers are formed.: I, II, and III
4. Blood returning to the mammalian heart in a pulmonary vein drains first into
the: left atrium.
5. Mechanical digestion, the process of breaking down large chunks of food into
smaller pieces, is important because smaller pieces of food .: have more
surface area for chemical digestion than do larger pieces of food
6. How does the avian lung function in order to meet the metabolic demands
of flight?: Gas exchange occurs during both inhalation and exhalation.
7. In an animal that switches between sexual and asexual reproduction, when
is sexual reproduction more likely to occur?: when conditions for survival are unfavorable
8. Which of the following correctly displays the sequence of developmental
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1. Although having evolved independently, the tracheal tubes of mammals
and insects are both supported by rigid tissues. The trachea of a mammal is
supported by cartilage, and the tracheae of an insect are supported by chitin.
What selective pressure most likely led to the convergent evolution of these
respiratory structures?: When air is the respiratory medium, there is a greater risk that the tracheal tubes
will collapse.
2. Organisms with a circulating body fluid that is distinct from the fluid that
directly surrounds the body's cells are likely to have .: a closed circulatory system
3. Which of the following is a result of gastrulation in animals?
I) The archenteron is formed.
II) The body axes are established.
1/2
, III) The germ layers are formed.: I, II, and III
4. Blood returning to the mammalian heart in a pulmonary vein drains first into
the: left atrium.
5. Mechanical digestion, the process of breaking down large chunks of food into
smaller pieces, is important because smaller pieces of food .: have more
surface area for chemical digestion than do larger pieces of food
6. How does the avian lung function in order to meet the metabolic demands
of flight?: Gas exchange occurs during both inhalation and exhalation.
7. In an animal that switches between sexual and asexual reproduction, when
is sexual reproduction more likely to occur?: when conditions for survival are unfavorable
8. Which of the following correctly displays the sequence of developmental
2/2
