STD 11 - 11. photosynthesis in higher plants — NEET STD 11 Science — Question

Methanogens belong to

What function is performed by sigma factor and rho factor in the process of transcription

Select the correct sequence of events.

Plant growth is unique because

Double fertilization process means

The destruction of the biological nature and activity of proteins by heat or chemical agent is called:

Read the following statements and choose option which contain wrong statement for growth.
(i) The period of growth is generally divided into three phases, namely, meristematic, elongation and maturation.
(ii) The constantly dividing cells, both at the root apex and the shoot apex, represent the meristematic phase of growth.
(iii) The cells proximal (just next, away from the tip) to the zone represent the phase of elongation.
(iv) Further away from the apex, i.e., more proximal to the phase of elongation, lies the portion of axis which is undergoing the phase of maturation.
(v) The cells in elongation phase region are rich in protoplasm, possess large conspicuous nuclei and cell walls are primary in nature.
(vi) Increased vacuolation, cell enlargement and new cell wall deposition are the characteristics of the cells in phase of meristematic region.
(vii) The cells of zone of maturation, attain their maximum size in terms of wall thickening and protoplasmic modifications.

A plant hormone used for inducing morphogenesis in plant tissue culture is