How does the eye regulates the amount of light that falls on retina?

Minerals are present in the soil in sufficient amounts. Do plants need to'adjust the types of solutes that reach thexylem?Which molecules help to adjust this? How do plants regulate the typeand \quantity of solutes that reach xylem?

How does stampede happen?

How glycolysis is regulated ?

How does an aeroplane take off ?

How does the bread become spongy ?

How does the bollworm die?

Answer the following questions : What happens when light falls on the retina ?

Which reservoir regulates the amount of carbon dioxide in the atmosphere?

On what factors does the energy carried by a quantum of light depend ?

How does the frequency of a beam of ultraviolet light change when it travelsfrom air into glass?