Nutrients which are required in large amounts in functioning of plant are known as macronutrients eg. Ca, Mg, N. Nutrients required in trace amounts are known as micronutrients. Manganese is a micronutrient for plants essential for synthesis of chlorophyll. It is also required for activation of enzymes of respiration and nitrogen metabolism.

Correct Option: C

Nutrients which are required in large amounts in functioning of plant are known as macronutrients eg. Ca, Mg, N. Nutrients required in trace amounts are known as micronutrients. Manganese is a micronutrient for plants essential for synthesis of chlorophyll. It is also required for activation of enzymes of respiration and nitrogen metabolism.

Iodine is the only such element which is an essential mineral for animals but is not required by plants.

Correct Option: C

Iodine is the only such element which is an essential mineral for animals but is not required by plants.

Phosphorus and nitrogen are essential elements normally required in large quantities by plants.

Correct Option: D

Phosphorus and nitrogen are essential elements normally required in large quantities by plants.

Potassium is not a constituent of any enzyme but is an activator of enzymes. Potassium is an essential mineral and is found in more amounts in actively dividing cells such as buds, young leaves, root tips, etc. It has some other roles like regulating stomatal movement and protein synthesis.

Correct Option: C

Potassium is not a constituent of any enzyme but is an activator of enzymes. Potassium is an essential mineral and is found in more amounts in actively dividing cells such as buds, young leaves, root tips, etc. It has some other roles like regulating stomatal movement and protein synthesis.

The parts of the plants that show the deficiency symptoms also depend on the mobility of the element in the plant. For element that are actively mobilised within the plants and exported to young developing tissues, the deficiency symptoms tend to appear first in the older tissues. For example, nitrogen, potassium and magnesium are visible first in the senescent leaves.

Correct Option: A

The parts of the plants that show the deficiency symptoms also depend on the mobility of the element in the plant. For element that are actively mobilised within the plants and exported to young developing tissues, the deficiency symptoms tend to appear first in the older tissues. For example, nitrogen, potassium and magnesium are visible first in the senescent leaves.