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

Whose living cells provide tensile and mechanical strength

Select the incorrect match

(A) TCT	Pituitary gland
(B) PTH	Pituitary gland
(C) MSH, TSH	Pituitary gland
(D) GIP	GIT

Stratification is more pronounced in

During meiosis in pollen mother cell the daughter cells are interconnected by passages. The whole structure is called

In many bacteria the cell membrane becomes invaginated and folded to form

Statement I: The end walls of sieve tube elements are perforated in a sieve-like manner to form the sieve plates.
Statement II: The companion cells help in maintaining the pressure gradient in the sieve tubes.

Statement I: As electrons move through the photosystems, protons are transported across the membrane.
Statement II: This happens because the primary accepter of electron which is located towards the outer side of the membrane transfers its electron not to an electron carrier but to an H carrier.

The pollen tube usually enters the embryo sac