Which was a possible source of high energy on early Earth that likely contributed to the origin of life?
a. redox energy
b. gamma radiation
c. volcanic activity
d. infrared radiation
e. geothermal energy
c
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Listeria monocytogenes causes listeriosis, an important ________.
A. insect-borne infection B. water-borne infection C. food-borne infection D. air-borne infection
Members of the ____ lineage, including slugs and snails, may have a shell, and most undergo torsion during
development.
a. Cephalopoda b. Polyplacophora c. Platyhelminthes d. Gastropoda e. Scaphopoda
One of the most common ways to get information out to a wide audience in the least amount of time regarding hot topics in science is by using
A) peer-reviewed journals. B) science magazines. C) the Discovery Channel on television. D) general interest news magazines or newspapers. E) books.
An Rh-negative mother will need a special treatment if she gives birth to an Rh-positive baby. The treatment involves the destruction of any stray blood cells from the baby that pass into the mother's bloodstream. Why is this necessary?
A) The mother's immune system will attack the Rh-positive cells and produce antibodies that will attack a fetus in a subsequent pregnancy. B) The mother's immune system will attack her own blood cells and the cells in the fetus of a subsequent pregnancy. C) Without this treatment, the mother's immune system will attack only her own blood cells. D) Without this treatment, antibodies will be formed in breast milk, which could harm the baby.