STD 11 - 6. Anatomy flowering plants — NEET STD 11 Science — Question

With regard to ecological food chain, man is a

China rose is called shoeflower because

Select the true statements for pollen grain :
(i) The pollen grains represent the male gametophytes.
(ii) It has a prominent two-layered wall.
(iii) The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known.
(iv) Pollen grain exine has prominent apertures called germ pores where sporopollenin, cellulose and pectin is absent.
(v) Pollen grains are well preserved as fossils because of the presence of cellulose and pectin.
(vi) The inner wall of the pollen grain is called the intine which made up of cellulose and pectin.

In Bougainvillea, thorns are the modifications of

First act in taxonomy is

The nuclear envelope reassembles during

Which is not a modification of stem?

Which of the following statement is true about the sporophytic stage in plant life cycle?

Statement I: In monocot stem epidermis is the outermost protective layer of the stem, covered with a thin layer of cuticle, it may bear trichomes and a few stomata.
Statement II: The monocot stem has a sclerenchymatous hypodermis.

Enzyme concerned with transfer of electrons are