Asexual reproduction produces genetically identical individuals because
a. chromosomes do not have to replicate during asexual reproduction.
b. it involves chromosome replication without cytokinesis.
c. no meiosis or fertilization take place.
d. cell division occurs only in meiosis.
e. the mitotic spindle prevents nondisjunction.
Answer: c. no meiosis or fertilization take place.
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Which of the following does NOT correctly describe antidiuretic hormone?
A. It regulates water turnover in the mammalian kidney. B. ADH secretion is stimulated by high blood osmolarity. C. It ultimately acts to reabsorb more water. D. It exerts it effects via the cAMP pathway. E. It does not involve the use of aquaporin molecules.
Speciation _____
A) occurs at such a slow pace that no one has ever observed the emergence of new species B) occurs only by the accumulation of small genetic changes over vast expanses of time C) must begin with the geographic isolation of a small, frontier population D) can involve changes to a single gene
Roundworms and arthropods are both ecdysozoans. This means they
A. have a body cavity that is completely lined with mesoderm. B. have the anus arise at or near the blastopore. C. have a trochophore larvae. D. periodically shed their outer covering. E. No answer choice is correct.
Figure 40.7
Where does hormonal adjustment to solute and volume levels occur?
A. A B. B C. C D. D E. C and D