The point of connection between two sister chromatids, before anaphase II of meiosis separates them, is called the
A. centriole
B. kinetochore.
C. centromere.
D. spindle apparatus.
E. centrosome.
C. centromere.
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Which of the following is NOT a part of the concept of organic farming?
A. use of organic fertilizers B. use of growth regulators C. nonuse of pesticides D. nonuse of inorganic fertilizers E. use of composted wastes
Out of the biomes listed, which receives the most precipitation?
a. tundra b. boreal forest c. chaparral d. savanna e. grassland
The Old Order Amish in Lancaster County is descended from one man and woman and has an unusually high
frequency of a recessive allele that causes Ellis-van Creveld syndrome. This is an example of ____.
a. a bottleneck b. mutation c. a founder effect d. gene flow e. genetic drift
The chemical group in box 5 of the accompanying figure is a:
a. hydrogen bond.
b. phosphate.
c. nucleotide.
d. pyrimidine.
e. protein