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

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Add solid urea to a beaker of water. the beaker gets very cold. is δh favorable or

What are the coordinates of vertex a of square abcd? a (–1, –6) b (–1, –2) c (–1, 6) d (–2, 1)