Telomeres are short DNA sequences ____
a. that code for genetic traits
b. that signal transcription to begin
c. located in the middle of a chromosome
d. located at each end of a chromosome
e. repeated along the backbone of a DNA molecule
d
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Transposable elements are:
A. proteins that can move outside of the nucleus. B. proteins that can move into the nucleus. C. DNA sequences that can insert themselves into RNA. D. DNA sequences that can insert themselves into new positions within the genome. E. None of the answer options is correct.
Conservation biology is a ____
a. mature science b. young science c. science that addresses speciation rates d. science practiced by environmentalists e. declining science
A skeleton has a faramen magnum tucked beneath the skull; this indicates that the skeletal remains are of a _____.
A. chimpanzee B. human C. lesser ape D. gorilla E. All answers are correct.
According to the pressure flow hypothesis of phloem transport,
A) solute moves from a high concentration in the source to a lower concentration in the sink. B) water is actively transported into the source region of the phloem to create the turgor pressure needed. C) the combination of a high turgor pressure in the source and transpiration water loss from the sink moves solutes through phloem conduits. D) the formation of starch from sugar in the sink increases the osmotic concentration. E) the pressure in the phloem of a root is normally greater than the pressure in the phloem of a leaf.