Which hormone is a very effective antioxidant, one that may protect CNS neurons from free radicals such as nitric oxide (NO) or hydrogen peroxide (H2O2)?

A) insulin
B) melanin
C) calcitonin
D) glucagon
E) melatonin


E) melatonin

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Match the pest terms with the pest definitions

a. arachnid d. pest b. vector e. weed c. insect 1. living organism that carries disease organism 2. organism that may adversely affect human activities 3. eight-legged animal 4. considered undesirable and out of place 5. six-legged animal

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In a process known as photosynthesis, the energy of ____________________ is used to produce nutrients

Fill in the blank(s) with correct word

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Propane can be used to locate the sources of vacuum leaks.

Answer the following statement true (T) or false (F)

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A heritability estimate of 40 or greater is considered by geneticists to be high

A. True B. False

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