Accessory pigments include molecules that reflect reds, oranges, and yellows. Leaves of many plants show these colors in the fall because
A. the cooler weather causes the plant to produce more of the accessory photosynthetic pigments.
B. the chlorophyll in the leaves degrades as the plants shed leaves.
C. the lessening of daylight as winter approaches causes the plant to produce more of the accessory photosynthetic pigments.
D. plants produce more chlorophyll.
E. All of the answer choices are correct.
B. the chlorophyll in the leaves degrades as the plants shed leaves.
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We currently know:
A. all of the genetic risk factors for most cancers and many common diseases. B. many genetic risk factors for some cancers and common diseases. C. the individual mutations that cause colon cancer, breast cancer, and Alzheimer's disease. D. the individual mutations that cause breast cancer, lung cancer, and inflammatory bowel disease. E. the combination of genetic risk factors that cause skin cancer, lung cancer, and colon cancer.
An Rh? woman who has an Rh+ baby will be treated with ____ to avoid making anti-Rh antibodies
a. a blood transfusion b. steroids c. RhoGam d. antibiotics e. large doses of vitamins
In most human populations, lactase levels are highest soon after birth and drop off in middle-to-late childhood
a. True b. False
Individuals who do not express CCR5 are highly resistant to infection by HIV
Indicate whether the statement is true or false