STD 11 - 13. Plant growth and development — NEET STD 11 Science — Question

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.

The recent branch of taxonomy is

Select the wrong statement for placentation.
i. In Mustard and Argemone, the ovary is one-chambered but it becomes two-chambered due to the formation of the false septum.
ii. In Dianthus and Primrose, the placentation is called free central.
iii. In basal placentation, the placenta develops at the base of the ovary and many ovules are attached.
iv. In sunflower and marigold, basal placentation present.
v. In mustard and Argemone, free central placentation present.

Leaves of dicotyledonous plants possess _________ venation, while _________ venation is the characteristic of most monocotyledons

The tip of the root apical meristem is proceeded by root pocket in

The most primitive in the following are

Apomixis is seen in