Justify why the predator/prey relationship is a community level interaction?

Are the earth's ocean floor and continents the same age geologically? why or why not?

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

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.