Linnaeus was the first to start classifying organisms
a. True
b. False
False
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A weight suspended from a spring bobs up and down over a distance of 1 m in 2 s. Its frequency is
A) 0.5 Hz. B) 1 Hz. C) 2 Hz. D) none of the above
Which biome is a hot, tropical grassland with scattered trees?
Boreal forest Desert Savanna Tundra
The primary source of oxygen for Earth's atmosphere during the past half billion years or so appears to be
a. ?volcanic eruptions. b. ?photosynthesis. c. ?radiant heat. d. ?exhalations of animal life. e. ?transpiration.
Which of the following statements regarding frostbite is correct?
A) Frostbite is an ischemic injury that is classified as superficial or deep. B) Frostbite most commonly affects the trunk and lower extremities. C) Frostbite can only occur if the ambient temperature is below 40°F. D) Increased blood flow to an extremity exacerbates deep frostbite.