What is an event that could have brought water to earths surface

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

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.