The light reactions of photosynthesis supply the calvin cycle with

The light reactions of photosynthesis supply the calvin cycle with ATP and NADPH.

Explanation:

In the light reaction the energy from photons present in the sunlight is used to split water into oxygen, hydrogen ions, and electron. These electrons moves through the electron transport chain and produce chemical energy in the form of ATP and  NADPH.

This ATP and NADPH is supplied to the Calvin cycle and the energy released by these molecules is used to convert carbon dioxide into glucose molecules with the help of the enzyme RuBisCo. As Calvin cycle does not require light, therefore, it is a light-independent reaction.

Therefore the light reactions of photosynthesis supply the Calvin cycle with ATP and NADPH.

cell division is not regulated in tumor cells.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.