Most of the earth’s usable carbon is in its
a. crust.
b. atmosphere.
c. biomass.
d. oceans.
e. mantle.
Answer: a
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The diagram below shows inbreeding between _________ which, over time, could lower the fitness of the population. This lowering of fitness because of inbreeding is called _________.
A. siblings; inbreeding depression
B. cousins; inbreeding depression
C. siblings; genetic drift
D. cousins; genetic drift
E. siblings; sexual selection
The last step of B cell activation is__________.
What will be an ideal response?
The ________ is a dense network of microfilaments just beneath the plasma membrane
Fill in the blank with correct word.
In the United States today, about half of the corn crop is genetically engineered with a protein that is toxic to corn borers, an insect pest of corn. Which of the following conditions would be necessary for evolution of resistance to the toxic protein to occur in the corn borer?
A. The corn borer must have or generate (by mutation) heritable variation in resistance to the toxic protein. The resistant corn borers must survive better or reproduce more than nonresistant corn borers. B. The corn borer must lack variation in resistance to the toxic protein. C. The corn borers must experience unlimited success in their ability to survive or reproduce. D. The corn borers must experience no success in their ability to survive or reproduce.