In photosystem I, P700 transfers an a. electron to chlorophyll (A0) upon excitation by a photon.
b. The electron is replaced by electrons generated by the proton gradient.
c. electrons donated directly from plastoquinone at QA.
d. the splitting of water molecules at the manganese center.
e. oxidation of pheophytin. electrons donated from NADPH.
f. electrons transferred from plastocyanin.

Earth's energy budget:

The earth’s energy budget is nothing but the balance maintained between the energy received from the sun, the energy that is being radiated back into the outer space after being distributed among  five components. About 50% of the energy received are being absorbed by the surface of earth that can be lad or oceans. Then 30% will be directly reflected back or returned back to the space by the clouds as the earth’s surface has different gases and particles present in it. And the rest 20% is being absorbed by the atmosphere or the clouds.Energy released from the Sun is given out as ultraviolet energy and  shortwave light .

Makes some of the liquid in semen. Also helps to regulate urine flow. Common site of male cancer.

Answer:

The prostate gland is a male reproductive organ whose main function is to secrete prostate fluid, one of the components of semen. The muscles of the prostate gland also help propel this seminal fluid into the urethra

Explanation:

Answer:

Saliva contain enzymes.

Explanation:

In the mouth, when chewing a bite of bread, it mixes with the saliva in the mouth which is secreted by the salivary gland. The food is broken down by chewing which is converted into Bolus through the saliva. The saliva comprises of digestive salivary amylase which help to digest carbohydrates and breakdown carbohydrates into smaller pieces.

Bread is a carbohydrate, digestive salivary amylase breakdown bread into sugars.

Therefore, digestion begin from the mouth and it contain saliva which comprises of the enzymes.

Chewing a bite of bread mixes it with saliva, which contains enzymes that help break down the carbohydrates in the bread.

Chewing a bite of bread mixes it with saliva and facilitates its chemical breakdown. This is most likely due to the fact that saliva contains enzymes that help to break down the carbohydrates in the bread. Enzymes are biological molecules that catalyze, or speed up, chemical reactions in the body. In this case, the enzymes in saliva help to break down the complex carbohydrates in the bread into smaller, simpler molecules that can be easily absorbed and used for energy.

Learn more about saliva and enzymatic breakdown of carbohydrates here:

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Answer:

Cellular Respiration

Explanation:

Metabolism is the sum of chemical reactions taking place in the living organisms. Cellular respiration is one such metabolic process.  Cellular respiration takes place in in the all organisms in which respiratory substrate such as glucose is oxidised completely in presence of oxygen to produce carbon dioxide, water and energy (ATP). Cellular respiration begins in cytoplasm and completes in the mitochondria of the cell.  The energy is used to do work.

The oxidation reaction is given below:

         C₆H₁₂O₆+ 6O₂ → 6CO₂+ 6H₂O + Energy  

Answer:

Oxidation is the answer