What was Marshall Nirenberg and Heinrich Matthaei’s contribution to our current understanding of the genetic code? discovery of codons
discovery and extraction of DNA
creation of a model of DNA
creation of Photo 51

Which codon is the code for the amino acid histidine (his)?

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

What best describes the dropping height of a ball that bounces back up to a height of 45 cm