Which theory states that eukaryotic organelles originated as prokaryotes that survived ingestion by a host cell and
ultimately evolved mutualistic relationships with the host cell?
a. endosymbiont theory
b. heterosymbiont theory
c. obligative symbiotic theory
d. facultative symbiotic theory
e. autotrophic symbiotic theory
a
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Mendel followed the transmission of traits through several generations in
A) frogs. B) peas. C) bacteria. D) the mustard weed.
During active transport, solutes are moving _______.
a. down their concentration gradient b. toward equilibrium c. against their concentration gradient d. it depends on what is being transported
Which cells secrete mucus?
A) type II alveolar cells B) ciliated cells C) alveolar macrophages D) type I alveolar cells E) goblet cells
When a DNA molecule is replicated, the daughter molecules contain one strand of parental DNA and one strand of newly synthesized DNA; this is called ________ replication.
A. conservative B. semiconservative C. hemiconservative D. dispersive