Lodgepole pines, often found in the taiga, have an interesting adaptation for reproduction. These trees produce female cones that are sealed by a thick resin. In order to release their seeds, the resin gluing the cones closed must be melted.
Which of the following will open the cones of lodgepole pines to release their seeds?
A. a drought
B. a tornado
C. a wildfire
D. a hurricane

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.