Of the following levels of organization, Archaea have
A) molecules only.
B) atoms only.
C) atoms and molecules.
D) atoms, molecules, and organs.
E) organs only.
C
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Chromosomes are usually studied and photographed while they are in anaphase of mitosis
a. True b. False Indicate whether the statement is true or false
In a healthy human cochlea, fluid is found in the ____
a. vestibular canal only b. vestibular and tympanic canals only c. tympanic canal only d. vestibular canal, tympanic canal, and cochlear duct e. cochlear duct only
The theory of evolution asserts which of the following?
a. Evolution identifies the origin of life. b. Only populations can evolve. c. Evolution is goal directed. d. Only individuals can evolve.
What would happen if an embryo failed to secrete HCG?
A) The maternal elements of the placenta would fail to develop. B) The fetal elements of the placenta would fail to develop. C) Neural tube formation would not occur, and the embryo would not have a brain. D) The embryo would be aborted.