The theory that eukaryotic organelles originated as prokaryotes that survived ingestion by a host cell
and ultimately evolved mutualistic relationships with the host cell is termed the:a.
obligative symbiotic theory.
b. heterosymbiont theory.
c. endosymbiont theory.
d. facultative symbiotic theory.
e. autotrophic symbiotic theory.
C
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The definition of simple primary tissues is that they are composed of which of the following?
A. one or two simple cell types B. several cell types C. many cell types D. All of the choices are correct. E. None of these choices is correct
The endomembrane system did not start developing until the atmosphere was ____
a. high in oxygen, high in carbon dioxide b. high in hydrogen, low in oxygen c. changing from low oxygen to high oxygen levels d. firmly in the age of aerobes e. low in hydrogen, low in oxygen
Resident biota of the gastrointestinal tract include ________.
A. Bacteroides B. Streptococcus C. Lactobacillus D. Haemophilus E. All of the choices are correct.
The individual credited with coining the term cancer is
A) Paget. B) Hippocrates. C) Folkman. D) Rous. E) Aristotle.