14. list and describe the 4 levels of protein structure. a. b. c. d.

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What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

"does stress during a woman's first trimester of a pregnancy affect the infant's birth weight? " is a