Thalloid plant body lack real vegetative structure, in place of root, rhizoids are present. - Marchantia belongs to class hepaticopsida of division bryophyta. It's plant body consist of a dichotomously branched thallus. They are also called liverworts. The plant body is a dorso-ventrally flattened thallus.
NEET (Karnataka)-2013
Plant kingdom
259355
Which of the following statements is true for Bryophyta
1 Along with water absorption roots also provide anchorment to plants
2 Sporophyte is dominant
3 Gametophyte is dominant and sporophyte is mostly parasitic
4 Gametophyte is parasitic
Explanation:
In life cycle of bryophyta gametophyte is dominant and sporophyte are mostly parasitic. - The life cycle of bryophyta involves alternation of generation with a haploid gametophyte giving rise to diploid sporophyte. - The sporophyte is not free living but attached to the photosynthetic gametophyte and derives nourishment from it.
AIPMT-1999
Plant kingdom
259356
Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tend to be
1 smaller and to have smaller sex organs
2 smaller but to have larger sex organs
3 larger but to have smaller sex organs
4 larger and to have larger sex organs
Explanation:
Bryophytes have a dominant gametophytes stage and produce structure called as antheridia and archegonia. In contrast, vascular plants have sporophytic plant body in most of the their life - cycle are reduced smaller gametophyte which have smaller sex organs. Ex- Riccia, Marchantia, Porella etc.
AIPMT (Screening)-2011
Plant kingdom
259361
Spore dissemination in some liverworts is aided by :
1 Peristome teeth
2 Elaters
3 Indusium
4 Calyptra
Explanation:
Elaters are tubular cells with spiral thickenigs and often help in spore release. It is water attracting cell structure found in the capsule of liverworts. It is hygroscopic in nature and it helps in dispersal of spores.
Thalloid plant body lack real vegetative structure, in place of root, rhizoids are present. - Marchantia belongs to class hepaticopsida of division bryophyta. It's plant body consist of a dichotomously branched thallus. They are also called liverworts. The plant body is a dorso-ventrally flattened thallus.
NEET (Karnataka)-2013
Plant kingdom
259355
Which of the following statements is true for Bryophyta
1 Along with water absorption roots also provide anchorment to plants
2 Sporophyte is dominant
3 Gametophyte is dominant and sporophyte is mostly parasitic
4 Gametophyte is parasitic
Explanation:
In life cycle of bryophyta gametophyte is dominant and sporophyte are mostly parasitic. - The life cycle of bryophyta involves alternation of generation with a haploid gametophyte giving rise to diploid sporophyte. - The sporophyte is not free living but attached to the photosynthetic gametophyte and derives nourishment from it.
AIPMT-1999
Plant kingdom
259356
Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tend to be
1 smaller and to have smaller sex organs
2 smaller but to have larger sex organs
3 larger but to have smaller sex organs
4 larger and to have larger sex organs
Explanation:
Bryophytes have a dominant gametophytes stage and produce structure called as antheridia and archegonia. In contrast, vascular plants have sporophytic plant body in most of the their life - cycle are reduced smaller gametophyte which have smaller sex organs. Ex- Riccia, Marchantia, Porella etc.
AIPMT (Screening)-2011
Plant kingdom
259361
Spore dissemination in some liverworts is aided by :
1 Peristome teeth
2 Elaters
3 Indusium
4 Calyptra
Explanation:
Elaters are tubular cells with spiral thickenigs and often help in spore release. It is water attracting cell structure found in the capsule of liverworts. It is hygroscopic in nature and it helps in dispersal of spores.
Thalloid plant body lack real vegetative structure, in place of root, rhizoids are present. - Marchantia belongs to class hepaticopsida of division bryophyta. It's plant body consist of a dichotomously branched thallus. They are also called liverworts. The plant body is a dorso-ventrally flattened thallus.
NEET (Karnataka)-2013
Plant kingdom
259355
Which of the following statements is true for Bryophyta
1 Along with water absorption roots also provide anchorment to plants
2 Sporophyte is dominant
3 Gametophyte is dominant and sporophyte is mostly parasitic
4 Gametophyte is parasitic
Explanation:
In life cycle of bryophyta gametophyte is dominant and sporophyte are mostly parasitic. - The life cycle of bryophyta involves alternation of generation with a haploid gametophyte giving rise to diploid sporophyte. - The sporophyte is not free living but attached to the photosynthetic gametophyte and derives nourishment from it.
AIPMT-1999
Plant kingdom
259356
Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tend to be
1 smaller and to have smaller sex organs
2 smaller but to have larger sex organs
3 larger but to have smaller sex organs
4 larger and to have larger sex organs
Explanation:
Bryophytes have a dominant gametophytes stage and produce structure called as antheridia and archegonia. In contrast, vascular plants have sporophytic plant body in most of the their life - cycle are reduced smaller gametophyte which have smaller sex organs. Ex- Riccia, Marchantia, Porella etc.
AIPMT (Screening)-2011
Plant kingdom
259361
Spore dissemination in some liverworts is aided by :
1 Peristome teeth
2 Elaters
3 Indusium
4 Calyptra
Explanation:
Elaters are tubular cells with spiral thickenigs and often help in spore release. It is water attracting cell structure found in the capsule of liverworts. It is hygroscopic in nature and it helps in dispersal of spores.
Thalloid plant body lack real vegetative structure, in place of root, rhizoids are present. - Marchantia belongs to class hepaticopsida of division bryophyta. It's plant body consist of a dichotomously branched thallus. They are also called liverworts. The plant body is a dorso-ventrally flattened thallus.
NEET (Karnataka)-2013
Plant kingdom
259355
Which of the following statements is true for Bryophyta
1 Along with water absorption roots also provide anchorment to plants
2 Sporophyte is dominant
3 Gametophyte is dominant and sporophyte is mostly parasitic
4 Gametophyte is parasitic
Explanation:
In life cycle of bryophyta gametophyte is dominant and sporophyte are mostly parasitic. - The life cycle of bryophyta involves alternation of generation with a haploid gametophyte giving rise to diploid sporophyte. - The sporophyte is not free living but attached to the photosynthetic gametophyte and derives nourishment from it.
AIPMT-1999
Plant kingdom
259356
Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tend to be
1 smaller and to have smaller sex organs
2 smaller but to have larger sex organs
3 larger but to have smaller sex organs
4 larger and to have larger sex organs
Explanation:
Bryophytes have a dominant gametophytes stage and produce structure called as antheridia and archegonia. In contrast, vascular plants have sporophytic plant body in most of the their life - cycle are reduced smaller gametophyte which have smaller sex organs. Ex- Riccia, Marchantia, Porella etc.
AIPMT (Screening)-2011
Plant kingdom
259361
Spore dissemination in some liverworts is aided by :
1 Peristome teeth
2 Elaters
3 Indusium
4 Calyptra
Explanation:
Elaters are tubular cells with spiral thickenigs and often help in spore release. It is water attracting cell structure found in the capsule of liverworts. It is hygroscopic in nature and it helps in dispersal of spores.
