Birds are most closely related to
A. crocodiles.
B. snakes.
C. mammals.
D. non-avian dinosaurs.
E. amphibians.
D. non-avian dinosaurs.
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Which of the following is NOT a way that many terrestrial ectotherms regulate their temperature?
a. moving into or out of the shade b. panting c. changing the angle of the body relative to the sun d. changing blood flow to the skin e. thermoregulation
Changes in heritable traits result from adaptation to environmental influences
Indicate whether the statement is true or false
In an ecosystem’s bottom-up processes, predators affect the abundances of other populations in the ecological
community. ____________________ Indicate whether the statement is true or false.
Worms with a well-developed circulatory system (including five pairs of hearts) are
A) echinoderms. B) eels. C) nematodes. D) annelids. E) platyhelminths.