The movement of water through a plant is
driven by
a. the drying power of the air.
b. osmosis.
c. active pumping using ATP.
d. root pressure.
e. a combination of more than one of these
A
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NEW: In cats, the gene for coat color is found on the X chromosome. Shown below is a mass of cells making up an early female cat embryo. The X chromosomes are shown in each cell; this embryo has one orange coat color allele (O) and one black coat color allele (B). Which of the following is ACCURATE about this embryo?
A. It will give rise to a calico cat.
B. It will give rise to a black cat, because black is dominant to orange.
C. It will give rise to an orange cat, as the paternal chromosomes carrying the black allele will be inactivated.
D. Since it is heterozygous, it will give rise to a cat with two Barr bodies in each cell.
E. Since it is heterozygous, it will give rise to a calico cat with two Barr bodies in each cell.
Mannitol salt agar is selective for organisms in which bacterial genus?
A. Staphylococcus B. Neisseria C. Escherichia D. Salmonella E. Streptococcus
The difference between an electrically neutral atom and an ion is that:a
an ion has an unequal number of protons and electrons, while an atom has an equal number. b. an ion has an equal number of protons and electrons, while an atom has an unequal number. c. an atom has an unequal number of neutrons and protons, while an ion has an equal number. d. an atom has its electrons in orbitals, while an ion has its electrons in its nucleus. e. an atom must have an equal number of neutrons and electrons, while an ion does not.
Which of the following uses patterns of STR fragments that have been cut by restriction enzymes and sorted by size?
A) cloning B) DNA sequencing C) DNA fingerprinting D) genetic engineering