Which of the following is true about haplotypes?
A. Defining a haplotype requires the identification of simple-sequence repeats (SSR) and long repetitive sequences in the human population from multiple individuals.
B. Single nucleotide polymorphisms (SNP) used to define the haplotype must be very close together on the chromosome.
C. Mitochondrial haplotypes are less stable because mitochondrial DNA recombines at a high frequency.
D. Haplotypes of the Y chromosome are not useful because only males have them.
E. Haplotypes can be used as markers to trace human migration.
E
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a. resin from conifers b. leaves from bamboo c. bark from willow trees d. fibers from flax plants e. seeds from yew trees
Nitrogen-fixing bacteria, in the roots of soybeans, help provide a source of nitrogen to the plants. In exchange, the bacteria obtain food from the plants. The bacteria are converting
A. ammonium (NH4) to nitrate (NO3). B. nitrate (NO3) to ammonium (NH4). C. nitrogen gas (N2) to nitrate (NO3). D. nitrogen gas (N2) to ammonium (NH4). E. nitrate (NO3) to nitrogen gas (N2).
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