Which of the following traits is not characteristic of amniotes?
a. internal fertilization
b. waterproof skin
c. aquatic larval stage
d. egg that can develop on land
c
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Although wildfires frequently result in the destruction of large areas of habitat, they also provide opportunities for some species of pine cone-bearing trees to disperse their seeds and grow new trees. In what other way does forest life benefit from wildfires?
a. Nocturnal predators are driven away from prey. b. Forest fires provide warmth during harsh winters. c. Ashes are rich in nitrogen and other nutrients. d. Smoke protects animals from harmful UV rays.
Actual gas exchange occurs through the walls of which type of vessel?
a. arteries b. arterioles c. capillaries d. veins e. venules
What age group on a population pyramid would you examine to predict the population in 25 years?
A. 0-5 B. 10-15 C. 20-25 D. 25-30
What is the largest sulfur reservoir on Earth?
a. the aquatic biosphere b. the oceans c. rocks and sediments d. the terrestrial biosphere