What is one difference between primary and secondary succession?

a. primary succession is slow and secondary succession is rapid.
b. primary succession modifies the environment and secondary succession does not.
c. secondary succession begins with lichen and primary succession begins with trees.
d. secondary succession begins on soil and primary succession begins on newly exposed surfaces.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.

Which hormone is used by both males and female?