Multiple Choice
Although having evolved independently, the tracheal tubes of mammals and insects are both supported by rigid tissues. The trachea of a mammal are supported by cartilage, and the tracheae of an insect are supported by chitin. Which of the following is a selective pressure that most likely led to the convergent evolution of these respiratory structures?
A) Both mammals and insects have similar oxygen needs.
B) When breathing air, there is a risk that trachea and tracheal tubes will collapse.
C) Insects and mammals both keep their internal temperature constant.
D) A decrease in environmental carbon dioxide made structural support necessary.
Correct Answer:
Verified
Correct Answer:
Verified
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