8. During which process of photosynthesis is light absorbed?
During which process is sugar produced?

Light is absorbed during the light dependent reactions.

Sugar is produced during the carbon fixation reactions

Explanation: Photosynthetic reactions are divided into two phases: light dependent reactions and carbon fixation reactions.

Light dependent reactions are so named because they occur only when plants are illuminated. During light dependent reactions, sunlight is absorbed and it is used to split one molecule of water. This process is called photolysis of water and the energy is conserved in form of ATP and NADPH.

In carbon fixation reactions, ATP and NADPH produced in light dependent reactions are used to drive the incorporation of three molecules of carbon dioxide into ribulose 1,5- bisphosphate in a cyclic pathway known as Calvin cycle to produce triose phosphate sugar. Triose phosphate produced is used in the synthesis of glucose and other related molecules such as starch.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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