Sheep do not normally show symptoms of age until
they are about ten years old. Dolly showed
symptoms of arthritis at
a. one month.
b. one year.
c. two years.
d. five years.
e. eight years.
Answer: d
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In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short?
A) 1 B) 1/2 C) 1/4 D) 1/6 E) 0
Characteristics between the branch points of a cladogram that are shared by all organisms above the branch point and are not present in any below it are called
A. homologous characters. B. homoplastic characters. C. ancestral characters. D. derived characters. E. novel characters.
Although there are several different types of plasmids they all
A. can confer some kind of selective growth advantage depending on environmental conditions B. can induce a mating phenotype. C. result in horizontal transfer. D. make cells resistant to antibiotics
The term obligate refers to
A. using oxygen for metabolism. B. using light for energy production. C. existing in a very narrow niche. D. using chemicals for energy production. E. the ability to exist in a wide range of conditions.