Why is anal sex more apt to transfer HIV than vaginal sex? What will be an ideal response?
ANSWER: The lining of the rectum is not evolved to withstand the friction that comes with sexual
intercourse. As a result, there is significantly more tearing that takes place in the rectum
during anal sex and this exposes the virus to the circulatory system where it thrives.
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How does a swim bladder help the ray-finned fishes maintain buoyancy?
A) It removes water from the digestive tract. B) It removes oxygen from the water and stores it. C) Gas is added to the bladder as the fish's depth increases. D) Gas is removed from the bladder as the fish's depth increases. E) It adds and removes salt from the water stored in the bladder, which changes its density and thus its buoyancy.
Which of the following lists gives the cellular processes for limb formation in correct order from first to last?
A. cell division, cell migration, cell differentiation, cell death B. cell migration, cell differentiation, cell division, cell death C. cell migration, cell division, cell differentiation, cell death D. cell division, cell differentiation, cell migration, cell death E. cell differentiation, cell migration, cell division, cell death
When making scientific decisions in one's life, it is best to ask questions, gather and evaluate information and evidence, and carefully consider the sources of the material. This process is called ________
Fill in the blank(s) with correct word
DNA that is circular and apart from the chromosome in a prokaryote is a(n)
A) nucleus. B) plasmid. C) nucleoid. D) ribosome. E) endospore.