The prothallus represents the haploid gametophytic generation. It is multicellular, independent, photosynthetic form that lives for a short duration. The prothallus needs a cool, damp and shady place to grow.
Rajasthan PMT-2001
Plant kingdom
259834
Which of the following statement is true?
1 Spores are gametes
2 Spores and gametes are diploid
3 Gametes are always haploid
4 Spores are always diploid
Explanation:
Gametes - gametes are formed through meiosis (reductional division) in which a germ cell undergoes two fissions, resulting in the production of 4 gametes. During fertilization, male and female gamete fuse, producing a diploid (i.e. containing paired chromosomes) zygote.
AIIMS-2000
Plant kingdom
259836
Select the wrong statement :
1 Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
2 Isogametes are similar in structure, function and behaviour
3 Anisogametes differ either in structure, function or behaviour
4 In Oomycetes female gamete is smaller and motile, while male gamete is larger and nonmotile
Explanation:
Oomycetes are fungus-like eukaryotic microbes. They reproduce both sexually and asexually. They include many pathogenic species of plants. Two distinct spore types are produced by oomycetes. The female gametes in sexual spores are big and non-motile. The male spore or gamete, in contrast, is tiny and motile.
NEET-2013
Plant kingdom
259838
Gametophyte is the dominant phase in the lifecycle of
1 Hibiscus
2 Nephrolepis
3 Cycas
4 Riccia
Explanation:
Sporophyte is the diploid stage and the gametophyte is the haploid stage. Gametophyte is the dominant phase in the lifecycle of bryophytes, which are the non-vascular plants. Riccia is a liverwort, belongs to bryophyte and hence it exhibit the dominant gametophytic stage.
Karnataka CET-2011
Plant kingdom
259844
In Ulothrix meiosis takes place in
1 Cells of the filament
2 Holdfast
3 Zygote
4 Zoospores.
Explanation:
The ulothrix plant are heterothallic and is sexually reproduced also by biflagellate gametes. Ulothrix meiosis (reduction division) occurs in zygote. Zygote (2n) undergoes meiosis to form four haploid quadriflagellate zoospores, each zoospore then develops into a new ulothrix thallus. Mitosis is followed by meosis to form 8 or 16 haploid nuclei.
The prothallus represents the haploid gametophytic generation. It is multicellular, independent, photosynthetic form that lives for a short duration. The prothallus needs a cool, damp and shady place to grow.
Rajasthan PMT-2001
Plant kingdom
259834
Which of the following statement is true?
1 Spores are gametes
2 Spores and gametes are diploid
3 Gametes are always haploid
4 Spores are always diploid
Explanation:
Gametes - gametes are formed through meiosis (reductional division) in which a germ cell undergoes two fissions, resulting in the production of 4 gametes. During fertilization, male and female gamete fuse, producing a diploid (i.e. containing paired chromosomes) zygote.
AIIMS-2000
Plant kingdom
259836
Select the wrong statement :
1 Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
2 Isogametes are similar in structure, function and behaviour
3 Anisogametes differ either in structure, function or behaviour
4 In Oomycetes female gamete is smaller and motile, while male gamete is larger and nonmotile
Explanation:
Oomycetes are fungus-like eukaryotic microbes. They reproduce both sexually and asexually. They include many pathogenic species of plants. Two distinct spore types are produced by oomycetes. The female gametes in sexual spores are big and non-motile. The male spore or gamete, in contrast, is tiny and motile.
NEET-2013
Plant kingdom
259838
Gametophyte is the dominant phase in the lifecycle of
1 Hibiscus
2 Nephrolepis
3 Cycas
4 Riccia
Explanation:
Sporophyte is the diploid stage and the gametophyte is the haploid stage. Gametophyte is the dominant phase in the lifecycle of bryophytes, which are the non-vascular plants. Riccia is a liverwort, belongs to bryophyte and hence it exhibit the dominant gametophytic stage.
Karnataka CET-2011
Plant kingdom
259844
In Ulothrix meiosis takes place in
1 Cells of the filament
2 Holdfast
3 Zygote
4 Zoospores.
Explanation:
The ulothrix plant are heterothallic and is sexually reproduced also by biflagellate gametes. Ulothrix meiosis (reduction division) occurs in zygote. Zygote (2n) undergoes meiosis to form four haploid quadriflagellate zoospores, each zoospore then develops into a new ulothrix thallus. Mitosis is followed by meosis to form 8 or 16 haploid nuclei.
The prothallus represents the haploid gametophytic generation. It is multicellular, independent, photosynthetic form that lives for a short duration. The prothallus needs a cool, damp and shady place to grow.
Rajasthan PMT-2001
Plant kingdom
259834
Which of the following statement is true?
1 Spores are gametes
2 Spores and gametes are diploid
3 Gametes are always haploid
4 Spores are always diploid
Explanation:
Gametes - gametes are formed through meiosis (reductional division) in which a germ cell undergoes two fissions, resulting in the production of 4 gametes. During fertilization, male and female gamete fuse, producing a diploid (i.e. containing paired chromosomes) zygote.
AIIMS-2000
Plant kingdom
259836
Select the wrong statement :
1 Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
2 Isogametes are similar in structure, function and behaviour
3 Anisogametes differ either in structure, function or behaviour
4 In Oomycetes female gamete is smaller and motile, while male gamete is larger and nonmotile
Explanation:
Oomycetes are fungus-like eukaryotic microbes. They reproduce both sexually and asexually. They include many pathogenic species of plants. Two distinct spore types are produced by oomycetes. The female gametes in sexual spores are big and non-motile. The male spore or gamete, in contrast, is tiny and motile.
NEET-2013
Plant kingdom
259838
Gametophyte is the dominant phase in the lifecycle of
1 Hibiscus
2 Nephrolepis
3 Cycas
4 Riccia
Explanation:
Sporophyte is the diploid stage and the gametophyte is the haploid stage. Gametophyte is the dominant phase in the lifecycle of bryophytes, which are the non-vascular plants. Riccia is a liverwort, belongs to bryophyte and hence it exhibit the dominant gametophytic stage.
Karnataka CET-2011
Plant kingdom
259844
In Ulothrix meiosis takes place in
1 Cells of the filament
2 Holdfast
3 Zygote
4 Zoospores.
Explanation:
The ulothrix plant are heterothallic and is sexually reproduced also by biflagellate gametes. Ulothrix meiosis (reduction division) occurs in zygote. Zygote (2n) undergoes meiosis to form four haploid quadriflagellate zoospores, each zoospore then develops into a new ulothrix thallus. Mitosis is followed by meosis to form 8 or 16 haploid nuclei.
The prothallus represents the haploid gametophytic generation. It is multicellular, independent, photosynthetic form that lives for a short duration. The prothallus needs a cool, damp and shady place to grow.
Rajasthan PMT-2001
Plant kingdom
259834
Which of the following statement is true?
1 Spores are gametes
2 Spores and gametes are diploid
3 Gametes are always haploid
4 Spores are always diploid
Explanation:
Gametes - gametes are formed through meiosis (reductional division) in which a germ cell undergoes two fissions, resulting in the production of 4 gametes. During fertilization, male and female gamete fuse, producing a diploid (i.e. containing paired chromosomes) zygote.
AIIMS-2000
Plant kingdom
259836
Select the wrong statement :
1 Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
2 Isogametes are similar in structure, function and behaviour
3 Anisogametes differ either in structure, function or behaviour
4 In Oomycetes female gamete is smaller and motile, while male gamete is larger and nonmotile
Explanation:
Oomycetes are fungus-like eukaryotic microbes. They reproduce both sexually and asexually. They include many pathogenic species of plants. Two distinct spore types are produced by oomycetes. The female gametes in sexual spores are big and non-motile. The male spore or gamete, in contrast, is tiny and motile.
NEET-2013
Plant kingdom
259838
Gametophyte is the dominant phase in the lifecycle of
1 Hibiscus
2 Nephrolepis
3 Cycas
4 Riccia
Explanation:
Sporophyte is the diploid stage and the gametophyte is the haploid stage. Gametophyte is the dominant phase in the lifecycle of bryophytes, which are the non-vascular plants. Riccia is a liverwort, belongs to bryophyte and hence it exhibit the dominant gametophytic stage.
Karnataka CET-2011
Plant kingdom
259844
In Ulothrix meiosis takes place in
1 Cells of the filament
2 Holdfast
3 Zygote
4 Zoospores.
Explanation:
The ulothrix plant are heterothallic and is sexually reproduced also by biflagellate gametes. Ulothrix meiosis (reduction division) occurs in zygote. Zygote (2n) undergoes meiosis to form four haploid quadriflagellate zoospores, each zoospore then develops into a new ulothrix thallus. Mitosis is followed by meosis to form 8 or 16 haploid nuclei.
The prothallus represents the haploid gametophytic generation. It is multicellular, independent, photosynthetic form that lives for a short duration. The prothallus needs a cool, damp and shady place to grow.
Rajasthan PMT-2001
Plant kingdom
259834
Which of the following statement is true?
1 Spores are gametes
2 Spores and gametes are diploid
3 Gametes are always haploid
4 Spores are always diploid
Explanation:
Gametes - gametes are formed through meiosis (reductional division) in which a germ cell undergoes two fissions, resulting in the production of 4 gametes. During fertilization, male and female gamete fuse, producing a diploid (i.e. containing paired chromosomes) zygote.
AIIMS-2000
Plant kingdom
259836
Select the wrong statement :
1 Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
2 Isogametes are similar in structure, function and behaviour
3 Anisogametes differ either in structure, function or behaviour
4 In Oomycetes female gamete is smaller and motile, while male gamete is larger and nonmotile
Explanation:
Oomycetes are fungus-like eukaryotic microbes. They reproduce both sexually and asexually. They include many pathogenic species of plants. Two distinct spore types are produced by oomycetes. The female gametes in sexual spores are big and non-motile. The male spore or gamete, in contrast, is tiny and motile.
NEET-2013
Plant kingdom
259838
Gametophyte is the dominant phase in the lifecycle of
1 Hibiscus
2 Nephrolepis
3 Cycas
4 Riccia
Explanation:
Sporophyte is the diploid stage and the gametophyte is the haploid stage. Gametophyte is the dominant phase in the lifecycle of bryophytes, which are the non-vascular plants. Riccia is a liverwort, belongs to bryophyte and hence it exhibit the dominant gametophytic stage.
Karnataka CET-2011
Plant kingdom
259844
In Ulothrix meiosis takes place in
1 Cells of the filament
2 Holdfast
3 Zygote
4 Zoospores.
Explanation:
The ulothrix plant are heterothallic and is sexually reproduced also by biflagellate gametes. Ulothrix meiosis (reduction division) occurs in zygote. Zygote (2n) undergoes meiosis to form four haploid quadriflagellate zoospores, each zoospore then develops into a new ulothrix thallus. Mitosis is followed by meosis to form 8 or 16 haploid nuclei.
