The Earth formed approximately
a. 4600 years ago.
b. 1 million years ago.
c. 1 billion years ago.
d. 4.6 billion years ago.
b
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Because the rose is a plant, the likely cloning vector used to introduce necessary genes was a
A. chromatid. B. virus. C. bacterial plasmid. D. cloned nucleus. E. fish genome.
Freshwater sponges deal with excess water flow into
their cells using which of the following? a. flagella b. cilia c. contractile vacuoles d. hydraulic pump proteins in their membrane e. none of these
When you have waxed your car, rainfall makes very large droplets that roll around on the hood. This property of the water molecule is known as
A. turgor pressure. B. transpiration. C. negative pressure potential. D. adhesion. E. cohesion.
Lamprey populations introduced into the Great Lakes have grown dramatically. Why?
A) Competitive species have driven them from the ocean. B) Fishers have intentionally introduced them with the hope of farming them for "eel skin." C) They have no natural predators in these waters. D) Lamprey stocking programs have been highly effective. E) A fish species that they naturally prey upon has recently been introduced into the Great Lakes.