What am I? I am structurally related to aspirin, and I help defend plants against insect attack
a. systemin
b. jasmonates
c. brassinosteroids
d. methyl salicylate
e. oligosaccharins
D
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The human vocal cords are located in the:
a. glottis b. pharynx c. trachea d. larynx e. bronchus
The balance between photosynthesis and ___________ is altered by the combustion of fossil fuels.
A. respiration B. sunlight C. growth D. decomposition
Genes that tend to be inherited together are said to be:
a. associated. b. related. c. similar. d. linked. e. alleles.
Why does sweating cool your body?
A) The water in sweat, as it is secreted from skin glands, is cooler than your body temperature. B) Heat energy from your skin is used to evaporate the water in the sweat. C) Water in sweat contains hydrogen bonds that react with skin cells and removes excess heat from the skin. D) Sweat contains a combination of chemicals that react with salt on the skin to create a heat-absorbing substance.