Answer:
Capture light energy and convert this light energy into chemical energy
Explanation:
During the light reaction of photosynthesis, both the photosystems photosystem I and and photosystem II get activated and excited electrons from these photosystems received by various receptors and they travel downhill according to the gradient. As a result of this downhill movement of electrons, NADPH and ATP are formed. These are further used in light independent reactions to produce sugar molecules which act as an energy source for the plants.
Thus the primary function of the light reaction is to capture light energy and convert this light energy into chemical energy.
They are abundant in cold, nutrient rich waters. They are also the primary producers, that can feed anything from microscopic, animal like zooplankton to multi-ton whales.
Solar energy is used by plants to make food for themselves and other organisms as well. Plants lie on the bottom of the energy pyramid or first on the food chain. This is because they are producers and other organisms gain energy from them. Solar energy plays a very vital role here, because the process of photosynthesis, which takes place in plants, is incomplete without solar energy. Therefore, we can say it is an ecosystem service. Solar energy is gained by plants, converted into chemical energy and biomolecules are produced. Without this, food web can't survive.
The cerebrum is the largest portion of the brain, and the longitudinal fissure is what divides the 2 hemispheres. But I'd think your answer is 'cerebrum'.
