How does water clarity have a direct effect on sea urchins

,

Explanation:

The higher the water clarity, the lower/or negligible is the number of urchin found in that particular water body. It is so because sea urchins prefer to stay in water bodies with proximity to rock pools and mud.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )