Which of these are techniques used in biotechnology?
A. PCR
B. RFLP
C. Southern blot
D. A & C only
E. A, B, & C
Answer: E. A, B, & C
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Attached earlobes are recessive to free earlobes. What is the probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes?
A. 25% B. 75% C. 50% D. 0%
Smooth muscle cells in the airways relax while those in the blood vessels contract in response to the hormone epinephrine. What would you expect to be different in these two types of cells exposed to epinephrine?
A. presence of epinephrine receptors B. exposure to epinephrine released by neighboring cells C. activation of protein kinases D. types of proteins expressed E. rate of metabolism
The accompanying figure is a photomicrograph of ____.?
a. a nucleus
b. a Golgi body
c. endoplasmic reticulum
d. a vacuole
e. a nucleoid
What is the name of the first international agreement on climate change?
A. Red List B. Montreal Protocol C. International Union for the Conservation of Nature D. Kyoto Protocol