Aspecific stretch of dna that codes for the amino acid sequence of a polypeptide is called a

Answer;

-Gene

A specific stretch of DNA that codes for the amino acid sequence of a polypeptide is called a gene.

Explanation;

-A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.

-Each gene occupies a specific position on a chromosome. Because genes provide instructions for making proteins, and proteins determine the structure and function of each cell in the body, it follows that genes are responsible for all the characteristics you inherit.

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.