Which structure of a protein is an unfolded amino acid chain? a. primary b. secondary c. tertiary d. quaternary

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?