Cytoplasmic division in oogenesis is unusual in that ________
a. the cytoplasm is not equally distributed to each daughter cell
b. a cell called a polar body, which lacks any DNA, is produced
c. the secondary oocyte is diploid
d. mitochondria are selectively degraded by lysosomes before cell division is complete
a
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Bile is crucial for ______ digestion because of its function in _______.
A. protein, protecting the stomach lining B. fat, solubilizing glycerol:fatty acid bonds C. nucleic acids, uncoiling DNA strands D. fat, emulsification E. protein, lyophilization
Nematocysts are used for
a. reproduction. b. excretion. c. muscle action. d. circulation. e. defense
Adhesion of plant cells is mediated by a pectin-rich region of the cell wall called the
a. external lamina. b. middle lamella. c. intermediate lamella. d. plasmodesmata.
Which one of the following would be a symptom of botulism?
a) Disfiguring nodules on the skin b) Lockjaw c) Flaccid paralysis d) Sepsis