The Hawthorne and apple maggot flies appear to have become reproductively isolated from each other largely becausethey:a
have different mating behaviors.
b. mate at different times of the day.
c. have adapted to two different hosts.
d. occupy different parts of the habitat.
e. do not share the same reproductive organs.
c
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In addition to inhibiting the transpeptidation reaction in cell wall synthesis, penicillins may also destroy bacteria by
A. inhibiting protein synthesis. B. inhibiting DNA replication. C. stimulating proteins to form holes in the plasma membrane. D. None of the choices are correct.
In plant leaves, what are the tiny pores that allow carbon dioxide to enter and oxygen to exit?
What will be an ideal response?
What is one disadvantage of excreting urea as opposed to uric acid?
a. Urea is more toxic than uric acid. b. Urea is less toxic than uric acid. c. Urea is excreted by respiratory structures. d. Urea requires more water for excretion. e. Urea is produced from ammonia, not nucleic acids.
Functions of the smooth endoplasmic reticulum include ________.
A) steroid synthesis, protein synthesis, and drug detoxification B) lipid synthesis, protein synthesis, and drug detoxification C) lipid synthesis and drug detoxification D) lipid synthesis and storage of genetic information