How do protists provide evidence for the step-wise evolution of mitosis?
A. In some protists the nuclear membrane fails to breakdown during mitosis.
B. Protists use conjugation instead of mitosis.
C. Only meiosis occurs in protists.
D. Mitosis has not been observed in any protist species.
A. In some protists the nuclear membrane fails to breakdown during mitosis.
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Polyploid plants are often unhealthy compared to diploid plants
a. True b. False
. Destruction of forest ecosystems in Brazil affects the amount of CO2 taken up from the atmosphere. In
consequence, altered levels of atmospheric CO2 may affect the climate in the American midwest. A person who studies these types of interactions would probably be called a(n) _____.
a. biosphere biologist b. community biologist c. ecosystem biologist d. physiological ecologist e. population biologist
Enzymes
a. are very specific. b. act as catalysts. c. are organic molecules. d. have special shapes that control their activities. e. are all of these.
A chromosome that has been broken and has lost a section has had a/an:
A) duplication. B) aneuploidy. C) deletion. D) translocation. E) inversion.