What is the largest carbon sink on Earth?
A) terrestrial biosphere
B) rocks and sediments
C) aquatic biosphere
D) fossil fuels
Answer: B
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A photoreceptor in seeds detects the ratio of red to far-red light, preventing seeds from germinating when:
A. it is too warm. B. it is too cold. C. they are in the shade of another plant. D. they are in direct sunlight. E. it is too dry.
In Sanger sequencing, what causes DNA synthesis to terminate at a specific base?
A) Restriction endonucleases cleave DNA after particular bases. B) Fluorescent molecules produce high-energy light that inactivates DNA polymerase. C) Incorporation of a deoxynucleotide that lacks a base causes DNA polymerase to stall. D) Incorporation of a dideoxynucleotide that lacks a 3? hydroxyl. E) Incorporation of a ribonucleotide that lacks a 5' phosphate.
What is the major assumption of the
exponential model of population growth?
a. resources are unlimited b. organisms selectively choose their mates c. the death rate equals the birth rate d. biotic potential is limited e. more than one of these is a major assumption of the exponential model
Which of the following conditions is best described by a polygenic model?
A. Huntington disease D. Fragile-X syndrome B. Lesch-Nyhan syndrome E. More than one of these C. Schizophrenia