Male gametophyte development of angiosperms is a complex process that requires coordinated of different cell type and tissue of both gametophytic \& sporophytic origin underlaid by specific gene expression patterns. Two sperms and a vegetative cell are produced by male gametophyte in angiosperms.
AIPMT (Re-Exam)-2015
Sexual Reproduction in Flowering Plants
262548
Function of filiform apparatus is to:-
1 Recognize the suitable pollen at stigma
2 Stimulate division of generative cell
3 Produce nectar
4 Guide the entry of pollen tube
Explanation:
Exp. D A filiform apparatus function is to guide the pollen tube into the synergids. The filiform apparatus is a finger-like projection, a highly thickened structure formed from synergid cell at the micropylar end.
AIPMT-2014
Sexual Reproduction in Flowering Plants
262549
Which one the following statements is correct?
1 Tapetum nourishes the doveloping pollen
2 Hard outer layer of pollen is called intine
3 Sporogenous tissue is haploid
4 Endothecium produces the micorspores
Explanation:
Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat. Tapetum reaches maturity at the same time of pollen grain formation. The pollen grain is surrounded by two layers as exine which forms the outer layer and intine which forms the inner layer.
NEET-2013
Sexual Reproduction in Flowering Plants
262550
What is the function of germ pore
1 Initiation of pollen tube
2 Release of male gametes
3 Emergence of radicle
4 Absorption of water for seed germination
Explanation:
The germ pore are appertures in the exine layer of the pollen grain sporopollenin is absent. - The germ pore help in the formation of the pollen tube and release of male gamete during fertilization. - There are usually three germ pores in dicot (tricoplate) and one in monocots (monocolpate).
Male gametophyte development of angiosperms is a complex process that requires coordinated of different cell type and tissue of both gametophytic \& sporophytic origin underlaid by specific gene expression patterns. Two sperms and a vegetative cell are produced by male gametophyte in angiosperms.
AIPMT (Re-Exam)-2015
Sexual Reproduction in Flowering Plants
262548
Function of filiform apparatus is to:-
1 Recognize the suitable pollen at stigma
2 Stimulate division of generative cell
3 Produce nectar
4 Guide the entry of pollen tube
Explanation:
Exp. D A filiform apparatus function is to guide the pollen tube into the synergids. The filiform apparatus is a finger-like projection, a highly thickened structure formed from synergid cell at the micropylar end.
AIPMT-2014
Sexual Reproduction in Flowering Plants
262549
Which one the following statements is correct?
1 Tapetum nourishes the doveloping pollen
2 Hard outer layer of pollen is called intine
3 Sporogenous tissue is haploid
4 Endothecium produces the micorspores
Explanation:
Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat. Tapetum reaches maturity at the same time of pollen grain formation. The pollen grain is surrounded by two layers as exine which forms the outer layer and intine which forms the inner layer.
NEET-2013
Sexual Reproduction in Flowering Plants
262550
What is the function of germ pore
1 Initiation of pollen tube
2 Release of male gametes
3 Emergence of radicle
4 Absorption of water for seed germination
Explanation:
The germ pore are appertures in the exine layer of the pollen grain sporopollenin is absent. - The germ pore help in the formation of the pollen tube and release of male gamete during fertilization. - There are usually three germ pores in dicot (tricoplate) and one in monocots (monocolpate).
Male gametophyte development of angiosperms is a complex process that requires coordinated of different cell type and tissue of both gametophytic \& sporophytic origin underlaid by specific gene expression patterns. Two sperms and a vegetative cell are produced by male gametophyte in angiosperms.
AIPMT (Re-Exam)-2015
Sexual Reproduction in Flowering Plants
262548
Function of filiform apparatus is to:-
1 Recognize the suitable pollen at stigma
2 Stimulate division of generative cell
3 Produce nectar
4 Guide the entry of pollen tube
Explanation:
Exp. D A filiform apparatus function is to guide the pollen tube into the synergids. The filiform apparatus is a finger-like projection, a highly thickened structure formed from synergid cell at the micropylar end.
AIPMT-2014
Sexual Reproduction in Flowering Plants
262549
Which one the following statements is correct?
1 Tapetum nourishes the doveloping pollen
2 Hard outer layer of pollen is called intine
3 Sporogenous tissue is haploid
4 Endothecium produces the micorspores
Explanation:
Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat. Tapetum reaches maturity at the same time of pollen grain formation. The pollen grain is surrounded by two layers as exine which forms the outer layer and intine which forms the inner layer.
NEET-2013
Sexual Reproduction in Flowering Plants
262550
What is the function of germ pore
1 Initiation of pollen tube
2 Release of male gametes
3 Emergence of radicle
4 Absorption of water for seed germination
Explanation:
The germ pore are appertures in the exine layer of the pollen grain sporopollenin is absent. - The germ pore help in the formation of the pollen tube and release of male gamete during fertilization. - There are usually three germ pores in dicot (tricoplate) and one in monocots (monocolpate).
Male gametophyte development of angiosperms is a complex process that requires coordinated of different cell type and tissue of both gametophytic \& sporophytic origin underlaid by specific gene expression patterns. Two sperms and a vegetative cell are produced by male gametophyte in angiosperms.
AIPMT (Re-Exam)-2015
Sexual Reproduction in Flowering Plants
262548
Function of filiform apparatus is to:-
1 Recognize the suitable pollen at stigma
2 Stimulate division of generative cell
3 Produce nectar
4 Guide the entry of pollen tube
Explanation:
Exp. D A filiform apparatus function is to guide the pollen tube into the synergids. The filiform apparatus is a finger-like projection, a highly thickened structure formed from synergid cell at the micropylar end.
AIPMT-2014
Sexual Reproduction in Flowering Plants
262549
Which one the following statements is correct?
1 Tapetum nourishes the doveloping pollen
2 Hard outer layer of pollen is called intine
3 Sporogenous tissue is haploid
4 Endothecium produces the micorspores
Explanation:
Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat. Tapetum reaches maturity at the same time of pollen grain formation. The pollen grain is surrounded by two layers as exine which forms the outer layer and intine which forms the inner layer.
NEET-2013
Sexual Reproduction in Flowering Plants
262550
What is the function of germ pore
1 Initiation of pollen tube
2 Release of male gametes
3 Emergence of radicle
4 Absorption of water for seed germination
Explanation:
The germ pore are appertures in the exine layer of the pollen grain sporopollenin is absent. - The germ pore help in the formation of the pollen tube and release of male gamete during fertilization. - There are usually three germ pores in dicot (tricoplate) and one in monocots (monocolpate).
