Which of the following colors contributes the least energy to photosynthesis?
A) blue
B) red
C) orange
D) green
Answer: D
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Which method of animal cell infection is used by enveloped viruses, but not non-enveloped viruses?
a. receptor-mediated endocytosis b. membrane-channel injection c. fusion d. diffusion
A large increase in exercise (say hiking for 20 miles a day for a week) requires _______________.
a. an increase in oxygen delivery to the muscles b. an increase in nutrient delivery to the muscles c. an increase in ATP levels in the muscles d. a and b are correct e. a, b, and c are correct
Pathogens of the skin often enter via hair follicles and ducts of the sweat glands
Indicate whether the statement is true or false
Two species of garter snakes live in the same geographic area. One mainly lives in water, and the other mainly on land, so they rarely encounter each other and do not interbreed. This is an example of what type of isolating mechanism?
A) temporal B) ecological C) mechanical D) directional