Which statements about collagen molecules are correct? 1 Both types of secondary structure occur within the molecules
2 Large numbers of hydrogen bonds stabilize the molecule
3 repeated amino acid sequences determine the tertiary structure

A.1,2 and 3 B.1 and 2 only C.1 and 3 only D. 2 and 3 only

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes