A seven month fetus will have difficulty surviving outside of the mother because
a. it will have difficulty breathing and regulating body temperature.
b. it is unable to suck and drink milk.
c. its skin is not fully developed.
d. its heart is not fully developed.
e. the nervous system is too immature to keep the baby alive.
A
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Which statement is true?
a. Atmospheric nitrogen is abundant and easily fixed by plants and phytoplankton. b. Climate models used by scientists only incorporate human contributions to the atmosphere. c. Fossil fuels are regenerated too slowly to be considered a renewable resource. d. Carbon and other elements are permanently sequestered within sediment on the ocean floor.
Hominins are characterized by
a. further expansion and elaboration of the brain. b. bipedalism. c. omnivorous feeding behavior. d. further expansion and elaboration of the brain and bipedalism. e. further expansion and elaboration of the brain, bipedalism, and omnivorous feeding behavior.
The nitrogenous base found in RNA but not in DNA
is a. adenine. b. cytosine. c. guanine. d. uracil. e. thymine.
Select all correct descriptions of the autonomic motor pathways of the peripheral nervous system.
a. control is involuntary b. effectors are smooth and cardiac muscle and glands c. two neurons per message d. All of the above.