The Skin is another example for a non-specific defense against disease. it acts as a barrier to microorganism entry. Describe how the skin protects itself after its surface is punctured.

The skin protects itself with blood clots, as well as bruising. It hardens and creates a thicker layer if punctures so that bacteria and microorganisms cannot make its way though the weak spot and into the body. It also sheds dead skin with new and healthy skin to constantly have a young barrier to withstand peneration.

Explanation:

Scabs, blood clots, extra skin/dead skin as well as bruising.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

it is either c or d and i know for sure it is not a or b