Which of the following is the strongest evidence for
the idea that present-day eukaryotic aerobes are the
descendants of the successful symbiotic association
of anaerobes and aerobes?
a. Mitochondria can produce ATP.
b. A mitochondrion can survive indefinitely when
removed from a eukaryotic cell.
c. A mitochondrion has its own set of DNA
molecules.
d. Fossilized mitochondria are older than the oldest
fossilized eukaryotes.
e. All eukaryotic cells have mitochondria.
Answer: c
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A woman with normal blood clotting mates with a man who has hemophilia. Their first child is a boy who has
hemophilia. Tests show that the father and son both have the same form of hemophilia, that it is X-linked, and that the boy has normal genetic inheritance. You can predict that if the couple has more children together, it is likely that ____.
a. all of the children will have hemophilia b. half of the boys and none of the girls will have hemophilia c. none of the other children should have hemophilia d. all of the boys and half of the girls will have hemophilia e. half of the boys and half of the girls will have hemophilia
A specific chemical product of microbes, plants, and some animals that is poisonous to other organism is called a toxin.
a. true b. false
Hereditary nonpolyposis colon cancers (HNPCC) ____
a. are rare in the United States, but common in Europe b. begin with a mutation in the APC gene c. are caused by one-of-a-kind DNA sequences called microsatellites d. are caused by one mutation in a single gene e. are caused by several mutations in several different genes
What organism is the main reservoir and host for Toxoplasma gondii?
A. Mosquito B. Mouse C. Cat D. Raccoon E. Dog