STD 11 - 3. Plant kingdom — NEET STD 11 Science — Question

Choose incorrect option w.r.t. amount of living material present in different trophic levels at a given time

In Pistia and Eichhornia, stems are modified to form

In moss, the sporophyte is differentiated into

Prophase of reduction division is divided into number of stages. The correct chronological sequence is

Choose the wrong statement for monocot root.
(i) There are usually two to four xylem and phloem patches.
(ii) Cambium ring develops between the xylem and phloem.
(iii) The pith is small or inconspicuous.
(iv) It is not undergo any secondary growth.
(v) The tangential as well as radial walls of the endodermal cells have a deposition of water-impermeable, waxy material-suberin-in the form of casparian strips.
(vi) Next to endodermis lies a few layers of thick- walled parenchymatous cells referred to as pericycle.

The calyptrogen of the root apex forms

True nucleus is absent in

According to F. Went, auxins transmit