The hormone cortisol is released by the adrenal gland as a response to physical or psychological stress. it can the heart rate, muscle growth, and cause many other effects as well. individuals who suffer from severe stress, anxiety, and depression tend to have chronically levels of cortisol in their blood.

all increase as cortisol is adaptive hormone

increase heart rate, stunt muscle growth, high levels of collesteral in their blood.

Explanation:

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.