Once the histones are removed from a chromosome in cellular division, one can see DNA spreading out in loops around the supporting protein structure, called the:
A. scaffold.
B. 1400-nm chromatin fiber.
C. 300-nm chromatin fiber.
D. 2-nm chromatin fiber.
E. beads on a string.
A
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Molecular techniques have shown that Cyanobacteria are not present in soil.
Answer the following statement true (T) or false (F)
Part of a DNA gene sequence reads CAT. If a mutation occurs that changes the T to A, will the final protein be affected?
What will be an ideal response?
Which factor explains a uniform distribution of individuals in a population?
A) soil nutrients available to a species of plant B) territoriality in a species of bird C) oxygen levels in a pond, where an oxygen-dependent bacterial species lives D) food availability for humans living in a certain geographic area
Which of the following statements would be consistent with the concept of sociobiology?
A. Only animals with highly developed brains can display social behavior. B. Human social behavior is quite different from the social behavior of other kinds of animals. C. There are fundamental similarities in the way all species of social animals interact. D. A person who studies the social behavior of wolves would be completely baffled by the social behavior of beavers.