We often hear young teenagers claim that oral sex doesn't count as "real" sex. Although oral sex won't cause pregnancy, it does have many of the same risks associated with "real" sex
Explain to one of these young teenagers what sorts of risks come with alternative forms of sexual contact, such as oral sex.
Oral sex can allow for the transmission of STDs into the throat or even the eyes. Certain STDs can be transmitted to mucus membranes other than those of the reproductive tract.
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Steroid hormones bind to receptors inside the cell and alter their conformation. The hormone-receptor complex is then transported into the nucleus, where it can directly affect gene expression. To get from the location where the receptor binds the hormone to its site of action, the hormone-receptor complex must _____.
A) undergo another conformational change B) become water soluble by binding to a carrier molecule C) be transported through the nuclear pore complex D) enter the smooth endoplasmic reticulum
Molecules made primarily of carbon and hydrogen are called hydrocarbons. In each of the following hydrocarbons, indicate how many hydrogen atoms are present: 12, 10, 8, or 6
A chain of five carbons joined to each other by single covalent bonds A chain of five carbon atoms with one double bond and the rest single bonds A chain of five carbon atoms with two double bonds and two single bonds A five-carbon molecule with four of the carbons linked by a single covalent bond, and with the fifth carbon attached by a single bond as a branch to the second carbon in the chain A ring of six carbon atoms held together by alternating single and double bonds
Animals that eat both plant and animal material are classified as
A. carnivores. B. herbivores. C. detritivores. D. omnivores. E. insectivores.
This figure depicts the Briggs experiment, in which he tested the hypothesis that light causes auxin to move to the shaded side of seedlings. Based on what you remember about this experiment, which shoot do you expect to bend the most?
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A. shoot A B. shoot B C. shoot D D. shoot C