Antibodies are
a. proteins.
b. steroids.
c. polysaccharides.
d. lipoproteins.
e. any of these.
Answer: a
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Diatoms reproduce by binary fission
Indicate whether the statement is true or false
The first amino acid that is assembled in
translation is
a. methionine b. valine c. lysine d. phenylalanine e. glycine
The production of pollen, seeds, and flowers attributed to the widespread distribution of angiosperms. Why is the production of seeds an advantage?
A. It allows fertilization in the absence of water. B. It protects and nourishes the embryo. C. It promotes pollination. D. It allows fertilization in moist areas. E. It is necessary for sexual reproduction.
Four of the five factors listed below are components
of the abiotic environment. Select the exception. a. soil b. rainfall c. competitors d. temperature e. sunlight