What is the term for the process when a blastula arranges itself into three distinct layers of cells?
a. relocation
b. division
c. gastrulation
d. differentiation
c. gastrulation
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The allergic response is primarily mediated by _____ antibodies.
A. IgG B. IgM C. IgA D. IgE E. IgD
Sea urchin reproduction involves all of the following
EXCEPT a. producing enormous numbers of eggs. b. allocating large amounts of energy and resources to making each egg. c. producing very small eggs. d. producing eggs with minimal energy reserves. e. rapid development of self-feeding larva from fertilized eggs.
Evolution that involves changes in allele frequencies over just a few successive generations is referred to as:
a. natural selection. b. microevolution. c. macroevolution. d. stabilizing selection. e. directional selection
The ATP that is produced in the light reactions is used by the cell to
A. reproduce and grow. B. build carbohydrate molecules. C. move electrons through the electron transport chain. D. split water into H+ and O2.