Which factor is most responsible for the rapid population explosion of humans?
a. more prevalence of microorganisms to fight diseases naturally
b. increasing availability of natural resources
c. decreasing migration of human and animal populations
d. decline in death rates without an equivalent decline in birth rates
e. advances in reproductive technology
ANSWER: d
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Rice and its grain relatives, maize, barley, and wheat, diverged from a common ancestor 50 million years ago. However, the chromosomes of these plants demonstrate extensive conserved arrangements of segments. This phenomenon is called
A. linkage disequilibrium. B. single nucleotide polymorphisms. C. contig. D. synteny. E. expressed sequence equilibrium.
Which of the following hormones requires iodine for its formation?
A. thyroxine B. thyroid-stimulating hormone C. parathyroid hormone D. calcitonin E. All of the answer options are correct.
Many breast cancers involve mutations in the BRCA1 gene. Explain the difference between sporadic
and familial breast cancer caused by this gene at a molecular level.
What will be an ideal response?The two major divisions of the vertebral nervous system are the:
a. autonomic and peripheral systems b. sympathetic and parasympathetic systems c. cranial and spinal nerves d. central and peripheral nervous systems e. brain and spinal cord