The greatest number of AIDS cases has occurred in
a. North America.
b. The Caribbean Islands.
c. Latin America.
d. Sub-Saharan Africa.
e. East Asia.
D
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Successive nucleotides of a DNA chain are joined by:
A. phosphodiester bonds between the 5' carbon of one nucleotide and the 2' carbon of the next. B. glycosidic bonds between the 5' carbon of one nucleotide and the 3' carbon of the next. C. hydrogen bonds between the complementary bases. D. ionic bonds between the phosphate group of one nucleotide and the sugar group of the next. E. phosphodiester bonds between the 3' carbon of one nucleotide and the 5' carbon of the next.
What is wood?
a. secondary xylem that has accumulated outside a cylinder of vascular cambium b. secondary xylem that has accumulated inside a cylinder of vascular cambium c. primary xylem that has accumulated outside a cylinder of vascular cambium d. primary xylem that has accumulated inside a cylinder of vascular cambium e. vascular cambium cells
____ may be the main factor contributing to colony collapse disorder (CCD) with honeybees
a. Herbicide use b. Insecticides use c. Habitat loss d. Disease e. Parasite infestation
The gray matter of the brain is associated with the
a. cerebral cortex. b. pons. c. optic chiasm. d. corpus callosum. e. thalamus.