91Ó°ÊÓ

Assertion: Boron is required for the uptake and utilization of calcium ion. Reason: Boron is not required for carbohydrate translocation.

Assertion: Calcium is a constituent of middle lamella. Reason: Calcium is required in mitotic division.

Assertion: Sulphur is present in two amino acids such as cysteine and methionine. Reason: Vitamin (thiamine, biotin, coenzyme-A) and ferredoxin also contains sulphur.

Assertion: Nutritional adaptation is found in insectivorous plants. Reason: They grow in \(\mathrm{N}_{2}\) deficient soil so to obtain nitrogen they eat and digest insect.

Assertion: Hydroponics is useful technique. Reason: Hydroponics is use for identification of essential element and their deficiency symptoms.

Assertion: \(\mathrm{K}^{+}\) is useful for transpiration process. Reason: \(\mathrm{K}^{+}\) ion help in opening and closing of stomata.

Assertion: Water splitting reaction in photosynthesis is essential for oxygen cvolution. Reason: \(\mathrm{Mn} 2^{+}, \mathrm{Cl}, \mathrm{Ca}^{21}\) ions required for photolysis of water during photosynthesis.

Assertion: Manganese toxicity leads to deficiency of iron and magnesium. Reason: Manganese competes with iron and magnesium for uptake.

Assertion: Nitrogen is limiting nutrient for both natural and agricultural ecosystems. Reason: Plant competes with microbes for limited nitrogen available in soil.

Assertion: Absorption of mineral is inhibited by anaerobic environment. Reason: Absorption of mineral is mainly active absorption require oxygenic respiration for more energy.