How do circulatory system and immune system work together to respond to an injury

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now