DENDROLOGY

Detailed explanation-1: -Photosynthesis is the process by which green plants synthesize glucose by utilizing carbon dioxide and water in the presence of chlorophyll and sunlight. The splitting of water H2O molecules into a hydrogen ion H+ and hydroxide ions OH occurs during photolysis. These hydroxide ions OH react to produce oxygen gas O2.

Detailed explanation-2: -Experiments conducted by Samuel Ruben and Martin Kamen by using radioactive isotopes helped to prove that the oxygen liberated during photosynthesis came from the water.

Detailed explanation-3: -Answer and Explanation: The water is the source of oxygen gas that is released by a photosystem. The photosystem is the process that involves light energy where water is split into hydrogen and oxygen ions. This process enables the plants to make their food.

Detailed explanation-4: -Water molecules split during photosynthesis to generate oxygen and hydrogen ions. As a result, plants expel oxygen, which is then used to reduce carbon dioxide and produce carbohydrates.

Detailed explanation-5: -Photosynthesis produces water as a byproduct. During photosynthesis, plants take carbon dioxide ( C O 2 ), and water ( H 2 O ) from the air and soil. In the plant cell, carbon dioxide is reduced, which results in the gain of electrons, whereas water is oxidized, which results in the loss of electrons.