________________ in the skin functions as a sunscreen, absorbing ultraviolet (UV) radiation that could damage DNA and other biological molecules.
Fill in the blank(s) with the appropriate word(s).
Melanin
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Essay on the Principle of Population, written by Thomas Malthus in 1798, influenced Darwin's thoughts as he struggled to understand what mechanisms could be at work to produce evolution. Malthus proposed that populations of animals and plants, including humans,
A. evolved from mainland to islands, thus explaining why the island flora and fauna resembled the mainland species so closely. B. decreased arithmetically in numbers while the nutrients available increased geometrically. C. increased arithmetically in numbers while the nutrients available only increased geometrically. D. increased geometrically in numbers while the nutrients available only increased arithmetically. E. increased geometrically in numbers while the nutrients available increased arithmetically.
The process of photosynthesis, including all of the enzymes and chemical intermediates, is completely
understood.
Indicate whether the statement is true or false.Which of the following would be considered a carrier of a sex-linked recessive defect?
a. a man with the defect b. a woman with the defect c. a father of a son with the defect d. the normal daughter whose father had the defect e. a son of two unaffected parents
One of the current strategies for the treatment of Ebola patients is the generation of monoclonal antibodies against the virus developed through transgenic tobacco plants
Indicate whether the statement is true or false