Which of the following indicates the correct sequence of mammalian egg coverings, beginning at the outside and
moving inward?
a. plasma membrane, jelly coat, zona pellucida
b. zona pellucida, vitelline envelope, plasma membrane
c. vitelline envelope, plasma membrane, jelly coat
d. granulosa cells, zona pellucida, plasma membrane
e. zona pellucida, granulosa cells, plasma membrane
d
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In the process of splitting water during photosynthesis, the first cyanobacteria released:a
hydrogen gas. b. oxygen gas. c. photons of light. d. heat from longer wavelengths of light. e. electrons, protons, and neutrons.
Cytotoxic T cells destroy cancerous cells by
A. releasing vesicles containing perforin. B. opsonization. C. activating natural killer cells. D. secreting cytokines. E. forming the membrane attack complex.
While on the voyage of the HMS Beagle, Darwin:
a) wrote Origin of Species. b) studied Malthus's book Essay on the Principle of Population. c) discovered a love of sea travel. d) corresponded extensively with Alfred Russel Wallace about their ideas on evolution. e) nurtured his love of studying nature, exploring plant and animal diversity, and collecting fossils.