What is the source of microtubules in animal cells?
a. cytoplasm
b. ribosome
c. centrosome
d. endoplasmic reticulum
c. centrosome
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What is the function of the oval window?
a. serves as the opening to maintain equilibrium of fluid pressures b. provides support for muscles that move the middle ear bones c. transitions sound from middle to inner ear d. acts as the ear drum
The reintroduction of wolves in the year 1995 increased biodiversity in Yellowstone National Park by suppressing elk and coyote populations, allowing revegetation of stream and river banks.
a. The United States b. Russia c. The United Kingdom d. Canada
The phenotypic differences between chimps and humans is best explained by ______________
A. the high variation in number of different genes between the two species B. the high number of inversion sequences C. epistatic changes to genes D. patterns of gene expression and regulation E. the large amount of “junk DNA” found in chimpanzee genomes
What triggers the defecation reflex?
A. Contraction of the colon B. Stretching of the rectum C. Voluntary contraction of a sphincter D. Emotional stress and a diet low in fiber E. Sufficient concentration of feces due to water removal