Prothallus of the fern produces gametes. Prothallus in the fern produces male and female gametes which after fertilization give rise to diploid which sporophyte which produces spore. The underside of the prothallus is where the gametes are produced from the male and female sex organs. Prothallus of the fern is gametophyte. It is green photosynthetic structure that is one cell thick usually heart or kidney shaped, 3$10 \mathrm{~mm}$ long and 2-8 $\mathrm{mm}$ broad.
VMMC-2009
Plant kingdom
259848
Calyptra develops from
1 venter wall of archegonium
2 outgrowth of gametophyte
3 neck wall of archegonium
4 paraphysis of the archegonial branch
Explanation:
Calyptra develops from venter wall of archaegonium. The protective covering around the eggs/sporophyte present inside the archegonium is known as calyptra. Cells in the enlarged portion of the archegonium, a structure resembling a flask, will produce calyptra as long as the egg is present there. Calyptra is often refered to as a hood, acover or a lid. It is a maternal gametophytic structure which is small and covers the capsule which contain the eggs/embryonic sporophyte. As the sporophytes are released from the capsule that is present in the center of the archegonium calypter disappears. It is considered to be a haploid tissue that grows in close association with the sporophytes in case of bryophtes and gymnosperms.
VMMC-2009
Plant kingdom
259850
Development of gametophyte from sporophyte without formation of spores is called:
1 apogamy
2 apospory
3 autogamy
4 hologamy
Explanation:
Apospory:- Apospory is the development of diploid (2n) gametophytes without meiosis and spores formation from vegetative or non reproductive cells of the sporophyte.
J and K CET-2003
Plant kingdom
259853
Which of the following is/are grouped under phanerogams?
1 Angiosperms
2 Gymnosperms
3 Pteridophytes
4 Both (a) and (b)
Explanation:
Phanerogams- German botanist A.W. Eichler divided the whole plant kingdom into phanerogams and cryptogams. Phanerogams are the most advanced plants on our planet and their plant body is divided into roots stems and leaves. They have particular reproductive organs that produce seeds also known as seedproducing plants. The pine trees, grasses, crops flowers, bamboo trees etc which we see around us all belongs to phanerogams it is the largest subkingdom. Which is divided into two parts gymnosperm and angiosperm.
Prothallus of the fern produces gametes. Prothallus in the fern produces male and female gametes which after fertilization give rise to diploid which sporophyte which produces spore. The underside of the prothallus is where the gametes are produced from the male and female sex organs. Prothallus of the fern is gametophyte. It is green photosynthetic structure that is one cell thick usually heart or kidney shaped, 3$10 \mathrm{~mm}$ long and 2-8 $\mathrm{mm}$ broad.
VMMC-2009
Plant kingdom
259848
Calyptra develops from
1 venter wall of archegonium
2 outgrowth of gametophyte
3 neck wall of archegonium
4 paraphysis of the archegonial branch
Explanation:
Calyptra develops from venter wall of archaegonium. The protective covering around the eggs/sporophyte present inside the archegonium is known as calyptra. Cells in the enlarged portion of the archegonium, a structure resembling a flask, will produce calyptra as long as the egg is present there. Calyptra is often refered to as a hood, acover or a lid. It is a maternal gametophytic structure which is small and covers the capsule which contain the eggs/embryonic sporophyte. As the sporophytes are released from the capsule that is present in the center of the archegonium calypter disappears. It is considered to be a haploid tissue that grows in close association with the sporophytes in case of bryophtes and gymnosperms.
VMMC-2009
Plant kingdom
259850
Development of gametophyte from sporophyte without formation of spores is called:
1 apogamy
2 apospory
3 autogamy
4 hologamy
Explanation:
Apospory:- Apospory is the development of diploid (2n) gametophytes without meiosis and spores formation from vegetative or non reproductive cells of the sporophyte.
J and K CET-2003
Plant kingdom
259853
Which of the following is/are grouped under phanerogams?
1 Angiosperms
2 Gymnosperms
3 Pteridophytes
4 Both (a) and (b)
Explanation:
Phanerogams- German botanist A.W. Eichler divided the whole plant kingdom into phanerogams and cryptogams. Phanerogams are the most advanced plants on our planet and their plant body is divided into roots stems and leaves. They have particular reproductive organs that produce seeds also known as seedproducing plants. The pine trees, grasses, crops flowers, bamboo trees etc which we see around us all belongs to phanerogams it is the largest subkingdom. Which is divided into two parts gymnosperm and angiosperm.
Prothallus of the fern produces gametes. Prothallus in the fern produces male and female gametes which after fertilization give rise to diploid which sporophyte which produces spore. The underside of the prothallus is where the gametes are produced from the male and female sex organs. Prothallus of the fern is gametophyte. It is green photosynthetic structure that is one cell thick usually heart or kidney shaped, 3$10 \mathrm{~mm}$ long and 2-8 $\mathrm{mm}$ broad.
VMMC-2009
Plant kingdom
259848
Calyptra develops from
1 venter wall of archegonium
2 outgrowth of gametophyte
3 neck wall of archegonium
4 paraphysis of the archegonial branch
Explanation:
Calyptra develops from venter wall of archaegonium. The protective covering around the eggs/sporophyte present inside the archegonium is known as calyptra. Cells in the enlarged portion of the archegonium, a structure resembling a flask, will produce calyptra as long as the egg is present there. Calyptra is often refered to as a hood, acover or a lid. It is a maternal gametophytic structure which is small and covers the capsule which contain the eggs/embryonic sporophyte. As the sporophytes are released from the capsule that is present in the center of the archegonium calypter disappears. It is considered to be a haploid tissue that grows in close association with the sporophytes in case of bryophtes and gymnosperms.
VMMC-2009
Plant kingdom
259850
Development of gametophyte from sporophyte without formation of spores is called:
1 apogamy
2 apospory
3 autogamy
4 hologamy
Explanation:
Apospory:- Apospory is the development of diploid (2n) gametophytes without meiosis and spores formation from vegetative or non reproductive cells of the sporophyte.
J and K CET-2003
Plant kingdom
259853
Which of the following is/are grouped under phanerogams?
1 Angiosperms
2 Gymnosperms
3 Pteridophytes
4 Both (a) and (b)
Explanation:
Phanerogams- German botanist A.W. Eichler divided the whole plant kingdom into phanerogams and cryptogams. Phanerogams are the most advanced plants on our planet and their plant body is divided into roots stems and leaves. They have particular reproductive organs that produce seeds also known as seedproducing plants. The pine trees, grasses, crops flowers, bamboo trees etc which we see around us all belongs to phanerogams it is the largest subkingdom. Which is divided into two parts gymnosperm and angiosperm.
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Plant kingdom
259847
Prothallus of the fern produces
1 spores
2 gametes
3 Both (a) and (b)
4 cones
Explanation:
Prothallus of the fern produces gametes. Prothallus in the fern produces male and female gametes which after fertilization give rise to diploid which sporophyte which produces spore. The underside of the prothallus is where the gametes are produced from the male and female sex organs. Prothallus of the fern is gametophyte. It is green photosynthetic structure that is one cell thick usually heart or kidney shaped, 3$10 \mathrm{~mm}$ long and 2-8 $\mathrm{mm}$ broad.
VMMC-2009
Plant kingdom
259848
Calyptra develops from
1 venter wall of archegonium
2 outgrowth of gametophyte
3 neck wall of archegonium
4 paraphysis of the archegonial branch
Explanation:
Calyptra develops from venter wall of archaegonium. The protective covering around the eggs/sporophyte present inside the archegonium is known as calyptra. Cells in the enlarged portion of the archegonium, a structure resembling a flask, will produce calyptra as long as the egg is present there. Calyptra is often refered to as a hood, acover or a lid. It is a maternal gametophytic structure which is small and covers the capsule which contain the eggs/embryonic sporophyte. As the sporophytes are released from the capsule that is present in the center of the archegonium calypter disappears. It is considered to be a haploid tissue that grows in close association with the sporophytes in case of bryophtes and gymnosperms.
VMMC-2009
Plant kingdom
259850
Development of gametophyte from sporophyte without formation of spores is called:
1 apogamy
2 apospory
3 autogamy
4 hologamy
Explanation:
Apospory:- Apospory is the development of diploid (2n) gametophytes without meiosis and spores formation from vegetative or non reproductive cells of the sporophyte.
J and K CET-2003
Plant kingdom
259853
Which of the following is/are grouped under phanerogams?
1 Angiosperms
2 Gymnosperms
3 Pteridophytes
4 Both (a) and (b)
Explanation:
Phanerogams- German botanist A.W. Eichler divided the whole plant kingdom into phanerogams and cryptogams. Phanerogams are the most advanced plants on our planet and their plant body is divided into roots stems and leaves. They have particular reproductive organs that produce seeds also known as seedproducing plants. The pine trees, grasses, crops flowers, bamboo trees etc which we see around us all belongs to phanerogams it is the largest subkingdom. Which is divided into two parts gymnosperm and angiosperm.
