Antipodals and synergids are
A. produced in the female gametophyte.
B. the result of double fertilization.
C. what will fuse to form the endosperm.
D. responsible for pollen tube formation.
E. nonfunctional vestigal structures.
A. produced in the female gametophyte.
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The primary function of external gills in aquatic animals is to
A. relay nerve impulses. B. exchange gases with the water. C. secrete reproductive hormones. D. defend against invading microorganisms. E. transport blood.
Following successful completion of a phase III trial for a particular drug, a biotechnology company would apply for a(an) ________ to receive approval to sell the drug
A) IND B) DNA C) NDA D) patent E) copyright
The concentration of the pesticide DDT is likely highest in which of the following?
A. a minnow B. a mosquito larva C. a seagull D. plankton E. algae
Otoliths are involved in
A. balance. B. smell. C. taste. D. hearing. E. vision.