B.

interphase

Cell cycle is divided into 2 phases.

(i) Interphase (a period of preparation for cell division)

(ii) M phase (the actual period of cell division).

The interphase cell is metabolically quite active. Interphase is the long nondividing phase further divided into G₁, S and G_2. It occupies 75 to 95% of entire cell division time.

D.

Lycopodium

In pteridophytes, majority of plants are homosporous (producing similar kind of spores) e.g., Lycopodium. However, plants of genera like Selaginella and Salvinia are heterosporous (producing macro and micro spores). Pinus and Cycas, which are gymnosperms, are also heterosporous.

A.

Fe, Mn, Cu, Mo, Zn

Micronutrients are elements needed in small amounts (less than 10 mmole$/$kg of dry matter). These are 8 in number and include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel.

A.

A-(iv), B - (iii), C- (ii), D- (i)

C.

temperate areas

Vernalization is the induction of a plant's flowering process by exposure to the prolonged cold of winter, or by an artificial equivalent. After vernalization, plants have acquired the ability to flower, but they may require additional seasonal cues or weeks of growth before they will actually flower.

Many temperate plants have vernalisation requirement and must experience a period of low temperature in winter, to initiate or accelerate flowering process, or in many fruit tree species, to induce dormancy and then break dormancy prior to flowering.