Which organelle can be considered a sorting, processing and packaging center?
a. vacuole
b. centriole
c. centrosome
d. Golgi complex
e. endoplasmic reticulum
d
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Crossing over
a. increases variability in gametes. b. happens only once per homologue pair. c. occurs between sister chromatids. d. prevents genetic recombination. e. is followed immediately by separation of each of the chromatids.
In June 2013, the U.S. Supreme Court ruled that if a gene is removed from the human body and purified it can be
patented. a. True b. False
In C. elegans ced-9/ced-3 double mutants
A. all 1090 cells live. B. all 1090 cells die. C. only 959 cells live. D. 131 cells always die.
The most conclusive evidence that viruses cause cancers is provided by
A) finding oncogenes in viruses. B) the presence of antibodies against viruses in cancer patients. C) cancer following injection of cell-free filtrates. D) treating cancer with antibodies. E) some liver cancer patients having had hepatitis.