Individuals with the progeria syndrome
a. number about one in eight million.
b. will have an accelerated rate of aging.
c. usually die in their teens.
d. carry a mutant gene for a nuclear structural
protein.
e. are all of these.
Answer: e
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A. microtubules B. microfilaments C. intermediate filaments
In female mammals, germ cells
A. are not produced until puberty. B. are arrested in meiosis I until puberty. C. develop into fully mature gametes before birth. D. are arrested in meiosis II until puberty.E. are arrested in mitosis until puberty.
Reticular fibers are the most numerous type of fiber that comprise connective tissue
____________________ Indicate whether the statement is true or false.
A major event in the Precambrian era responsible for dramatically increasing organic material on Earth was:
A) deposition of carbon in rocks. B) leaching of sulfur into the oceans. C) evolution of photosynthesis. D) evolution of mitochondria.