There are __________ autosomes present in a human egg. What will be an ideal response?
ANS: 22
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What helical forms are adopted by double-stranded RNA?
A. There is evidence for B-form RNA in viruses. B. There is no evidence that A-form RNA occurs in cells. C. The A form is the only form found for double-stranded RNA in cells and in viruses. D. There is evidence that Z-form RNA occurs in cells under certain conditions. E. The A form occurs only in the laboratory.
Which of these diagrams represents an age structure diagram of more-developed countries?
A. Diagram A B. Diagram B
Which of the following processes dominates the third trimester of human development?
A) formation of external features such as arms and legs B) formation of hair and fingernails C) rapid growth D) organ formation
In the phalarope, or wadepiper bird, the male is unusual in playing the larger parenting role -- he performs all the egg incubation and chick care. What unusual behavior might you predict for the female of the species?
A. The female is part of a large harem of females, under the domain of a single male. B. The female provides sperm to fertilize the male's eggs. C. The females have dull, brown coloring that keeps them well-camouflaged. D. The females compete to mate with the males, who choose among them.