Motor units containing only a few hundred muscle fibers are found where?
a. arm
b. eye
c. back
d. thigh
e. neck
ANSWER: b
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A marine biologist observes that Mako sharks, flying fish, and salmon leap out of the water. An example of induction from these observations is:
a. only some fishes can leap out of the water. b. all fishes leap out of the water. c. fishes leap out of the water to escape from predators. d. leaping out of water is often used in feeding. e. these fish must be closely related.
A protist such as Chlamydomonas may switch to sexual reproduction when:
A) there is little nutrition. B) hormones from nearby members of the species are detected. C) there are numerous predators. D) a 90-day cycle is completed.
If left untreated, an infection with ___ can lead to pelvic inflammatory disease and infertility.
A. Streptococcus pneumoniae B. N. meningitidis C. N. gonorrhoeae D. Streptotoccus pyogenes E. Staphylococcus aureus
Which population has a small percentage of Denisovan genes, thus suggesting interbreeding?
a. Asians b. Melanesians c. H. floresiensis d. Neanderthals e. chimpanzees