Unequal distribution of yolk and other components in a mature egg is termed ____
a. cleavage
b. gastrulation
c. involution
d. neurulation
e. polarity
ANSWER: e
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Organic molecules are defined as chemical compounds that contain in distinct ratios and structures.
A. carbon and nitrogen B. carbon and oxygen C. carbon D. carbon and hydrogen E. carbon, hydrogen, and nitrogen
Once they are identified, ____ take priority in worldwide conservation efforts
a. healthy ecosystems b. riparian zones c. hot spots d. grasslands e. forests
The net movement of substances to regions of lower concentration is called
A. facilitation. B. active transport. C. diffusion. D. osmosis.
When does the fetus achieve about 15 percent of its birth weight and start kicking?
A) at the start of organogenesis B) in the third trimester C) in the first trimester D) in the second trimester E) at the end of embryonic phase