Which of the following occurs during assembly?
A. Viral spikes insert in host cell membrane.
B. The nucleocapsid is formed.
C. The viral envelope and the host cell membrane fuse.
D. The nucleocapsid is formed and viral spikes insert in host cell membrane.
E. New viral nucleic acid is formed.
Answer: D
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Examine the figure above, which shows indices of aquatic and terrestrial primary productivity. Based on concentrations of chlorophyll, primary productivity in the ocean
A. is uniform, since the ocean is a single continuous body of water. B. tends to increase with increase temperatures, from the poles to the equator. C. is greatest in the open ocean, due to less air pollution and cloud cover. D. is usually high in warm, tropical seas. E. tends to be high near polar regions, due to seasonal mixing that redistributes nutrients.
Based on the graph of the mixed culture, what is happening?
a. formation of a dominance hierarchy b. interspecific competition c. resource partitioning d. an increase in species diversity
In a cross of a homozygous dominant parent and a homozygous recessive parent, what is the ratio of offspring that will exhibit the recessive phenotype?
A. 1/4. B. 0. C. 1. D. 3/4. E. 1/2.
In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by _____
A) hydrogen bonds B) nonpolar covalent bonds C) polar covalent bonds D) ionic bonds