Question 181 of 501
The innermost layer of the anther wall is called:
The innermost wall layer is the tapetum.
Sexual Reproduction in Flowering Plants MCQs
Class XII Biology • NCERT Based • NEET Practice
Question 182 of 501
Cells of sporogenous tissue undergo which division to form microspore tetrads?
Cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads.
Question 183 of 501
Pollen grains represent the:
The pollen grains represent the male gametophytes.
Question 184 of 501
The exine of pollen grains is made of:
The hard outer layer called the exine is made up of sporopollenin.
Question 185 of 501
Germ pores are areas on the exine where:
Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent.
Question 186 of 501
The vegetative cell of the pollen grain has:
The vegetative cell... has abundant food reserve and a large irregularly shaped nucleus.
Question 187 of 501
In 60% of angiosperms, pollen is shed at:
In over 60 per cent of angiosperms, pollen grains are shed at this 2-celled stage.
Question 188 of 501
Parthenium or carrot grass causes:
Parthenium or carrot grass... causes pollen allergy.
Question 189 of 501
Pollen grains can be stored in liquid nitrogen at:
It is possible to store pollen grains... in liquid nitrogen (-196 C).
Question 190 of 501
A multicarpellary, syncarpous pistil is found in:
Pistils may be fused together (syncarpous) (Figure 1.7b - Papaver).