Brainliest + points!

every night, the average human body experiences an increase in melatonin levels, and then every day the levels decrease.

is this an example of a periodic event? explain.

Melatonin is a natural hormone that is synthesized in the human body that is responsible for controlling the sleep cycle inside the human body.

This is released when the sun sets down and there is darkness, then the level of melatonin begins to rise in the blood and its level are high till morning.

Its level is elevated in the blood for almost 12 hours and then falls back to low during daytime.

This happens in the same way daily which is controlled by a cycle and is a period event.

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.