What region of the brain integrates visceral activities, body temperature, and heartbeat?
A. Medulla oblongata
B. Cerebrum
C. Corpus callosum
D. Thalamus
E. Hypothalamus
Answer: E
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The fusion of the cytoplasms of two genetically different cells is ____
a. osmosis b. karyogamy c. cytoplasmic streaming d. plasmogamy e. symbiosis
Which of the following is the correct sequence for the cell cycle?
A. S-G2-M-G1 B. S-M-G1-G2 C. S-G1-M-G2 D. S-M-G2-G1 E. S-G1-G1-M
In Yellowstone National Park, the reintroduction of wolves has led to
A) increased fruit consumption in elk. B) a decrease in deciduous tree growth. C) a decrease in the elk population. D) an increase in the elk population.
A particular haploid strain of yeast contains a temperature-sensitive mutation in its cdc2 gene resulting in no functional Cdc2 protein at the nonpermissive temperature
At the nonpermissive temperature, each of the following events would fail to occur at the appropriate cell cycle stage except A) replication of DNA. B) fragmentation of the nuclear envelope. C) condensation of chromosomes. D) appearance of the mitotic spindle. E) prevention of fusion of chromosome ends.