Identifying an individual by his or her DNA is referred to as ____.
A. structural genomics
B. genomic fingerprinting
C. RNA profiling
D. DNA profiling
E. individual genomics
Answer: D
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Which one of the following statements does not accurately describe the sex chromosomes?
A. The X chromosome has a gene density similar to most autosomes. B. In contrast to the approximately 1000 genes on the X chromosome, the Y chromosome contains only about 50 genes. C. The relative size and gene content of the X and Y chromosomes is very similar across species. D. Crossing over between the X and Y chromosomes occurs in very small regions of homology between the two chromosomes. E. Crossing over between the X and Y chromosomes allows the sex chromosomes to align correctly during metaphase I and separate from each other during anaphase I.
What component of a negative feedback mechanism does the brain or spinal cord represent?
a. response b. sensor c. integrator d. effector e. stimulus
Which tree of the North American eastern
forests has had its population decimated by a fungal disease?
a. chestnut b. maple c. oak d. eastern pine e. dogwood
Neurotransmitters like acetylcholine
A. are manufactured in the synapse. B. permanently attach to neuronal membranes. C. are always present in the synapse. D. stimulate neurons.