Does carbon dioxide enter a plant when the guard cells swell or when they shrink?

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.

What is the difference between how ionic and covalent bonds form

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.