According to the endosymbiont hypothesis, eukaryotic cells evolved after and as a consequence of ____
a. the cyclic pathway of photosynthesis
b. anaerobic respiration
c. cell division
d. mutual dependency
e. chemosynthesis
ANSWER: d
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The decline of MPF activity at the end of mitosis is due to _____
A) the destruction of the protein kinase Cdk B) decreased synthesis of Cdk C) the degradation of cyclin D) the accumulation of cyclin E) synthesis of DNA
During meiosis homologous pairs of chromosomes ____
a. move together to the newly formed cells b. ultimately create diploid cells c. are sorted in a dependent fashion d. may exchange corresponding segments e. stay in the cytoplasm
Different scientists have speculated about how the first living thing appeared on Earth. All of the following are supported by evidence EXCEPT
A. origin on Earth of a photosynthetic autotroph. B. origin on Earth of a chemosynthetic autotroph. C. origin on Earth of an anaerobic heterotroph. D. an organism arrived from an extraterrestrial source.
Which of the following are incorrectly matched?
A) varicella-zoster — chickenpox B) parvovirus — fifth disease C) HHV-6 — roseola D) herpes zoster — shingles E) poxvirus — fever blisters