Suppose a DNA fingerprinting analysis reveals that DNA from a crime scene matches a suspect’s DNA at four out of
five different loci. What can be concluded from this information?
What will be an ideal response?
ANSWER: This means that the DNA at the crime scene did not come from the suspect. If it did, all five loci would match.
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Which of the following groups of animals does NOT exhibit a "double circulation" and four-chambered hearts?
A. mammals B. birds C. crocodilians D. snakes E. All of the groups listed exhibit a complete double circulation.
What can be inferred from the accompanying graph?
a. This reaction is endergonic, with a positive ?G. b. This reaction is endergonic, with a negative ?G. c. This reaction is exergonic, with a positive ?G. d. This reaction is exergonic, with a negative ?G. e. There is not enough information to make a determination.
The diaphragm is responsible for what?
a. pushing on the lungs during exhalation b. pulling on the lungs to inflate them c. creating negative pressure around the lungs d. creating positive pressure around the lungs
Why might traits such as skin color be fairly consistent within a racial group, but alleles for skin color aren't consistent?
A) There's no relationship between alleles and skin color. B) Skin color is influenced by many genes, so several different gene pools can produce the same skin color. C) Only one gene is important in skin color, and when analysis is limited to that gene, there's clear evidence of a long separation of groups. D) Few allele variations between groups are just what you would expect if races were genealogical species.