How many pairs of homologous chromosomes would be present in a cell in G0 phase?
a. four
b. two
c. one
d. none
e. cannot determine from the information given
Answer: e. cannot determine from the information given
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Most of the exchange surfaces of multicellular animals are lined with _____
A) connective tissue B) smooth muscle cells C) neural tissue D) epithelial tissue E) adipose tissue
Which of the following is a benefit of recombination during meiosis in eukaryotes?
A. Branched intermediates aid in segregation by keeping the homologous chromosomes together. B. Crossing over can result from recombination, decreasing the combinations of alleles in each meiotic product. C. Recombination introduces mutations that lead to increased variation in the population. D. Recombination does not occur during meiosis. E. None of the choices given is correct.
The type of bond illustrated in the accompanying diagram is a(n):
a. ionic bond.
b. polar bond.
c. hydrogen bond.
d. single covalent bond.
e. double covalent bond.
Mitochondria and chloroplasts resemble bacteria in that they
a. have their own DNA. b. have their own ribosomes. c. reproduce by simple division into two. d. All of the above