267350
A bryophyte suddenly started reproducing parthenogenetically. The number of chromosomes of the second generation compared to parent plant will be]#
1 same
2 one-half
3 double
4 triple
Explanation:
(a) The number of chromosomes of the second generation will be same because no reduction division take place.
Plant kingdom
267351
A bryophyte differs from pteridophytes in having
1 archegonia.
2 lack of vascular tissue.
3 swimming antherozoids.
4 independent gametophytes.
Explanation:
(b)Bryophytes completely lack vascular tissue system and absorb water by generally body surface. Whereas pteridophytes are the first terrestrial plants to possess vascular tissues -xylem and phloem.
NCERT Page-35 / N-29
Plant kingdom
267352
Protonema
1 is a stage of gametophytic generation.
2 is a creeping, green, branched and develops directly from a spore.
3 Filamentous stage.
4 All of the above
Explanation:
(a) A protonema is a creeping, green, filamentous, thread-like chain of cells which is produced by the germination of the spores and forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore.
NCERT Page-36 / N-30
Plant kingdom
267353
Mosses are of great ecological importance because of
1 its contribution to prevent soil erosion.
2 its contribution in ecological succession.
3 its capability to remove $\text{CO}$ from the atmosphere.
4 both (a) and (b)
Explanation:
(d)Mosses along with lichens are the first organisms to colonise rocks and hence, are of great ecological importance. They decompose rocks making the substrate suitable for the growth of higher plants. Since mosses form dense mats on the soil, they reduce the impact of falling rain and prevent soil - erosion.
NCERT Page-35 / N-30
Plant kingdom
267354
Mossesdo not have 'true leaves' because their leaflike structures lack
1 starch in their chloroplast.
2 vascular tissues.
3 chlorophyll.
4 cellulose in their cell walls.
Explanation:
(b)Mosses are non-vascular plants which means they cannot transport water and nutrients to the aerial parts of the plant.
267350
A bryophyte suddenly started reproducing parthenogenetically. The number of chromosomes of the second generation compared to parent plant will be]#
1 same
2 one-half
3 double
4 triple
Explanation:
(a) The number of chromosomes of the second generation will be same because no reduction division take place.
Plant kingdom
267351
A bryophyte differs from pteridophytes in having
1 archegonia.
2 lack of vascular tissue.
3 swimming antherozoids.
4 independent gametophytes.
Explanation:
(b)Bryophytes completely lack vascular tissue system and absorb water by generally body surface. Whereas pteridophytes are the first terrestrial plants to possess vascular tissues -xylem and phloem.
NCERT Page-35 / N-29
Plant kingdom
267352
Protonema
1 is a stage of gametophytic generation.
2 is a creeping, green, branched and develops directly from a spore.
3 Filamentous stage.
4 All of the above
Explanation:
(a) A protonema is a creeping, green, filamentous, thread-like chain of cells which is produced by the germination of the spores and forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore.
NCERT Page-36 / N-30
Plant kingdom
267353
Mosses are of great ecological importance because of
1 its contribution to prevent soil erosion.
2 its contribution in ecological succession.
3 its capability to remove $\text{CO}$ from the atmosphere.
4 both (a) and (b)
Explanation:
(d)Mosses along with lichens are the first organisms to colonise rocks and hence, are of great ecological importance. They decompose rocks making the substrate suitable for the growth of higher plants. Since mosses form dense mats on the soil, they reduce the impact of falling rain and prevent soil - erosion.
NCERT Page-35 / N-30
Plant kingdom
267354
Mossesdo not have 'true leaves' because their leaflike structures lack
1 starch in their chloroplast.
2 vascular tissues.
3 chlorophyll.
4 cellulose in their cell walls.
Explanation:
(b)Mosses are non-vascular plants which means they cannot transport water and nutrients to the aerial parts of the plant.
267350
A bryophyte suddenly started reproducing parthenogenetically. The number of chromosomes of the second generation compared to parent plant will be]#
1 same
2 one-half
3 double
4 triple
Explanation:
(a) The number of chromosomes of the second generation will be same because no reduction division take place.
Plant kingdom
267351
A bryophyte differs from pteridophytes in having
1 archegonia.
2 lack of vascular tissue.
3 swimming antherozoids.
4 independent gametophytes.
Explanation:
(b)Bryophytes completely lack vascular tissue system and absorb water by generally body surface. Whereas pteridophytes are the first terrestrial plants to possess vascular tissues -xylem and phloem.
NCERT Page-35 / N-29
Plant kingdom
267352
Protonema
1 is a stage of gametophytic generation.
2 is a creeping, green, branched and develops directly from a spore.
3 Filamentous stage.
4 All of the above
Explanation:
(a) A protonema is a creeping, green, filamentous, thread-like chain of cells which is produced by the germination of the spores and forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore.
NCERT Page-36 / N-30
Plant kingdom
267353
Mosses are of great ecological importance because of
1 its contribution to prevent soil erosion.
2 its contribution in ecological succession.
3 its capability to remove $\text{CO}$ from the atmosphere.
4 both (a) and (b)
Explanation:
(d)Mosses along with lichens are the first organisms to colonise rocks and hence, are of great ecological importance. They decompose rocks making the substrate suitable for the growth of higher plants. Since mosses form dense mats on the soil, they reduce the impact of falling rain and prevent soil - erosion.
NCERT Page-35 / N-30
Plant kingdom
267354
Mossesdo not have 'true leaves' because their leaflike structures lack
1 starch in their chloroplast.
2 vascular tissues.
3 chlorophyll.
4 cellulose in their cell walls.
Explanation:
(b)Mosses are non-vascular plants which means they cannot transport water and nutrients to the aerial parts of the plant.
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Plant kingdom
267350
A bryophyte suddenly started reproducing parthenogenetically. The number of chromosomes of the second generation compared to parent plant will be]#
1 same
2 one-half
3 double
4 triple
Explanation:
(a) The number of chromosomes of the second generation will be same because no reduction division take place.
Plant kingdom
267351
A bryophyte differs from pteridophytes in having
1 archegonia.
2 lack of vascular tissue.
3 swimming antherozoids.
4 independent gametophytes.
Explanation:
(b)Bryophytes completely lack vascular tissue system and absorb water by generally body surface. Whereas pteridophytes are the first terrestrial plants to possess vascular tissues -xylem and phloem.
NCERT Page-35 / N-29
Plant kingdom
267352
Protonema
1 is a stage of gametophytic generation.
2 is a creeping, green, branched and develops directly from a spore.
3 Filamentous stage.
4 All of the above
Explanation:
(a) A protonema is a creeping, green, filamentous, thread-like chain of cells which is produced by the germination of the spores and forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore.
NCERT Page-36 / N-30
Plant kingdom
267353
Mosses are of great ecological importance because of
1 its contribution to prevent soil erosion.
2 its contribution in ecological succession.
3 its capability to remove $\text{CO}$ from the atmosphere.
4 both (a) and (b)
Explanation:
(d)Mosses along with lichens are the first organisms to colonise rocks and hence, are of great ecological importance. They decompose rocks making the substrate suitable for the growth of higher plants. Since mosses form dense mats on the soil, they reduce the impact of falling rain and prevent soil - erosion.
NCERT Page-35 / N-30
Plant kingdom
267354
Mossesdo not have 'true leaves' because their leaflike structures lack
1 starch in their chloroplast.
2 vascular tissues.
3 chlorophyll.
4 cellulose in their cell walls.
Explanation:
(b)Mosses are non-vascular plants which means they cannot transport water and nutrients to the aerial parts of the plant.
267350
A bryophyte suddenly started reproducing parthenogenetically. The number of chromosomes of the second generation compared to parent plant will be]#
1 same
2 one-half
3 double
4 triple
Explanation:
(a) The number of chromosomes of the second generation will be same because no reduction division take place.
Plant kingdom
267351
A bryophyte differs from pteridophytes in having
1 archegonia.
2 lack of vascular tissue.
3 swimming antherozoids.
4 independent gametophytes.
Explanation:
(b)Bryophytes completely lack vascular tissue system and absorb water by generally body surface. Whereas pteridophytes are the first terrestrial plants to possess vascular tissues -xylem and phloem.
NCERT Page-35 / N-29
Plant kingdom
267352
Protonema
1 is a stage of gametophytic generation.
2 is a creeping, green, branched and develops directly from a spore.
3 Filamentous stage.
4 All of the above
Explanation:
(a) A protonema is a creeping, green, filamentous, thread-like chain of cells which is produced by the germination of the spores and forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore.
NCERT Page-36 / N-30
Plant kingdom
267353
Mosses are of great ecological importance because of
1 its contribution to prevent soil erosion.
2 its contribution in ecological succession.
3 its capability to remove $\text{CO}$ from the atmosphere.
4 both (a) and (b)
Explanation:
(d)Mosses along with lichens are the first organisms to colonise rocks and hence, are of great ecological importance. They decompose rocks making the substrate suitable for the growth of higher plants. Since mosses form dense mats on the soil, they reduce the impact of falling rain and prevent soil - erosion.
NCERT Page-35 / N-30
Plant kingdom
267354
Mossesdo not have 'true leaves' because their leaflike structures lack
1 starch in their chloroplast.
2 vascular tissues.
3 chlorophyll.
4 cellulose in their cell walls.
Explanation:
(b)Mosses are non-vascular plants which means they cannot transport water and nutrients to the aerial parts of the plant.