is a type of tissue consisting of multiple layers of epithelial cells that can contract and expand.

Transitional epithelium

Explanation:

Transitional epithelium consists of a epithelial cells that are arranged in a stratified manner or in multiple layers, which gives the cells a structure or ability to change shape. He epithelium tissues n contract and expand as a result of the arrangement of the cells. The cells are connected by junctional complexes.

The transitional epithelium is found in the organs of the urinary system, especially in the urinary bladder, ureters, and urethra. The transitional epithelium found in the urinary system functions in giving protection, allowing the organ to contract and expand, and also to withstand osmotic pressure.

from the original order (top to bottom) the new order will go

1 (founder)

4 (hawk)

2 (mutate)

3 (next generation)

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.