Persons infected with HIV often die of opportunistic diseases because
A. HIV binds to antibodies.
B. HIV is a retrovirus.
C. HIV can transduce other viruses into virulent strains.
D. HIV mutates easily.
E. HIV destroys T cells.
Answer: E
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Comparisons of genetic information from various invertebrate groups has ____
a. confirmed nearly all classifications that were based on phenotypic resemblances b. provided a complete and final picture of animal phylogeny c. led to a decision to forgo formal classification of animals d. led to a reshuffling of the classification of animals that is still being refined e. confirmed that some invertebrates should be classified as vertebrates
The bacterium shown to be associated with the majority of gastric ulcers is
A) Streptococcus lactis. B) Staphylococcus aureus. C) Helicobacter pylori. D) Escherichia coli. E) Streptococcus pyogenes.
In agriculture, male animals are often castrated to modify their behavior and to produce desirable qualities in the meat. What would you predict about hormone levels in castrated male animals?
A. Testosterone is low; follicle stimulating hormone (FSH) and luteinizing hormone (LH) are low. B. Testosterone is high; follicle stimulating hormone (FSH) and luteinizing hormone (LH) are low. C. Testosterone is low; follicle stimulating hormone (FSH) and luteinizing hormone (LH) are high. D. Testosterone is high; follicle stimulating hormone (FSH) and luteinizing hormone (LH) are high.
How could lipids lead to a myocardial infarction?
What will be an ideal response?