Human skin color likely represents a locally adapted compromise between
A) the need to block UV radiation that causes cancer and the need to absorb sunlight for heat.
B) the need to block UV radiation that destroys folate and the need to synthesize vitamin D.
C) the need to block UV radiation that destroys folate and the need to absorb sunlight for heat.
D) the need to blend in with the environment and the need to absorb sunlight for heat.
Answer: B
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Electron microscopy has greater ________ than light microscopy, because the wavelengths of visible light are much larger than the wavelengths of electrons
A) contrast B) magnification C) resolution D) penetration
Genetic information carried by a(n) __________
directs the synthesis of a __________ chain during translation. Fill in the blank(s) with the appropriate word(s).
After studying biology, it is hoped that you will
A. get a high paying job as a biologist. B. understand all there is to know about humans and biology. C. become an animal rights activist. D. dislike anything to do with biology. E. be better able to make wise decisions regarding your own well-being and the Earth's.
Osmosis can only occur if water travels through the?
What will be an ideal response?