Pharyngeal arches will become all of the following EXCEPT
a. the face.
b. the neck.
c. the mouth.
d. structures associated with the head region.
e. lower stomach.
E
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In nature, plant fitness may be strongly influenced by:
A. the capacity to deter herbivores. B. the ability to resist pathogens. C. the ability to grow tall. D. the ability to disperse over large distances. E. More than one answer is correct.
A new virus has recently been identified that has been linked to certain birth defects. A pregnant woman is infected with this virus in the fifth month of her pregnancy. However, at birth, the infant shows no signs of the characteristic birth defects. What is the most likely explanation?
A) The virus actually doesn't cause birth defects. B) The woman was likely infected after the virus' critical period. C) The woman was actually infected by a different virus. D) The woman was likely infected during the virus' critical period.
A molecule of water in the middle of a chunk of ice will usually have ____ hydrogen bonds with other
water molecules.
a. 3 b. 3.4 c. 6 d. 4 e. 2
The protein coat surrounding the viral genome is called the
A. matrix. B. capsid. C. envelope. D. capsule.