More than 100 years ago, Charles Darwin and his colleague Thomas Huxley hypothesized that humans share a common ancestor based on:
a. anatomical evidence.
b. evidence gathered during Darwin's voyage on the HMS Beagle.
c. manipulative experiments.
d. All of the above.
A
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Avery, McLeod, and McCarty continued Griffith’s work with S. pneumoniae and concluded from their
experiments that DNA was the hereditary material. What would happen to mice after injection of heatkilled virulent bacteria mixed with live avirulent bacteria after treatment with proteinase if protein was the hereditary material instead of DNA?
a. the mice would live b. the mice would die c. the mice would get sick but recover d. the mice would grow tumors e. the mice would degrade the protein
Which of the following is an example of a density-independent factor that affects population growth?
a. food availability b. disease c. earthquakes d. predation
In addition to fertilizing the egg, sperm also ____
a. assist the fertilizing sperm in penetrating the egg b. trigger chemical changes in the egg c. dissolve the outer barriers surrounding the oocyte
d. release chemicals to speed cell division in the zygote e. trigger chemical changes in the egg that prevent the entry of more than one sperm
The eukaryotic cell cycle is composed of four phases in the following order:
a. G1; S; G2; M b. G1; G2; S; M c. G1; M; G2; S d. S; G1; G2; M