Anonymous
Anonymous asked in Science & MathematicsBiology · 4 weeks ago

bio homework help?

Effects of DDE on the Endocrine System: The American alligators (Alligator mississippiensis) that survived the initial spill were found to have high concentrations of DDE in their tissues. Decades later, the alligators in the lake still have DDE in their tissues and their populations do not seem to have recovered to pre-spill conditions. Many juvenile male alligators have low levels of testosterone.

Answer the following questions:

• How would low levels of testosterone affect the American alligator population?

• Based on your reading of the materials in this unit, how do environmental factors affect fertility in humans?

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  • Anonymous
    4 weeks ago

    It gives men small penises

  • 4 weeks ago

    > How would low levels of testosterone affect the American alligator population?

    Can't tell from this paragraph alone.  However, reading around the internet, it appears that the male alligators are somewhat feminized compared with a group that had not been contaminated with DDT/DDE.  Since the population had not recovered, and given the lower levels of testosterone, I would hypothesize that the DDT spill resulted in adults that were less successful in reproducing than normal.

    > how do environmental factors affect fertility in humans?

    I didn't read your unit.

    o An abundance of food in the environment increases fertility in humans.  Starving girls don't ovulate and can't support a pregnancy.

    o Hormone-mimicking chemicals can decrease fertility in humans.  Birth control pills and implants obviously do that.  Environmental hormone-mimickers can reduce sperm quality in males, which would also reduce fertility.

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