In humans, what ordinarily determines the sex of the offspring?
A) autosomes carried by the egg cell
B) autosomes carried by the sperm cell
C) sex chromosome carried by the egg cell
D) sex chromosome carried by the sperm cell
D
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The average adult carries 10 times more microbial cells (1014) than human cells (average about 1013).
Answer the following statement true (T) or false (F)
How are species-area relationships traditionally plotted?
A. on a log-linear plot B. on a bar graph. C. on a log-log plot D. on a linear plot E. as a function of distance
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.
Cormorants are sea-dwelling birds that consume high levels of salt from the seawater they drink. To get rid of this excess salt, cormorants "sneeze" out the salt that has collected in a localized area near their sinuses. This process is an example of
A) osmoregulation. B) thermoregulation. C) conduction. D) radiation.