Sexually transmitted diseases are a major cause of infertility. Knowing this, what method of birth control would you think is best for reducing infertility rates?
A. diaphragm
B. vasectomy
C. condoms
D. oral contraceptives
E. IUDs
C. condoms
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Why are the words "about" and "approximately" used in discussing the results of genomic analysis? Predict what advances in knowledge or methods could change our understanding of a genome sequence
What will be an ideal response?
HIV once only infected nonhuman primates and now infects humans as well. Likewise, the avian flu only infected birds but now infects humans. What causes the host range of a virus to increase?
A. The size of the virus changes over time and allows the virus to infect a different host cell. B. The virus integrates with another virus to gain the DNA sequences that allow infection of a new host cell. C. The virus gains entry into a new host cell through random mutation of the virus's genetic material. D. Changes in the human genome over time make humans more susceptible to infection by different kinds of viruses. E. None of the answer options is correct.
One job of the nuclear membrane is to
A. control entry to and exit from the nucleus. B. produce enzymes. C. digest chromosomes. D. contain excess water.
Please choose the answer that best fills in the blanks of this sentence in the correct order. Immunodeficiency diseases that are congenital (present at birth) and genetic in origin are referred to as _______ immunodeficiency diseases, whereas those that are acquired during an individual's lifetime and are not genetic in origin are referred to as _______ immunodeficiency diseases.
A) Innate; adaptive B) Secondary; primary C) Primary; secondary D) True; opportunistic