What is the site of primary sensory integration in the brain?
A. Cerebrum
B. Thalamus
C. Medulla oblongata
D. Corpus callosum
E. Cerebellum
Answer: B
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What technique is used to separate cellular proteins for analysis?
A. Western blots B. Antibody microarrays C. Two-dimensional gel electrophoresis D. Functional protein microarrays
Muscle cells are not typical cells because
a. groups of them fuse in the embryo to form multinucleated fibers. b. they contain actin proteins. c. they contain myosin proteins. d. they respond to stimuli. e. all of these are true.
A type of natural selection in which organisms with phenotypes at both extremes of the phenotypic range are favored by the environment
During the late 1800s, cattle egrets arrived in South America from Africa and began to colonize. Their range has expanded dramatically over the years. Why were they able to do this?
A. The habitats that they left in Africa were not suitable for any further colonization; thus, they were forced to emigrate. B. The habitats that they encountered in South America were suitable to them and unoccupied. C. The food resources in South America were far superior to those in Africa, allowing the egrets more opportunity to grow and reproduce and ultimately expand their range. D. There were abundant cattle for the birds to gather around in South America; furthermore, various animals that the egrets had lived around in Africa had become quite scarce because of over hunting and poaching, causing the birds to extend their range.