259825
Choose the correct pair of taxa showing following sets of characters in sequence (I) Trachaeophytic heterosporous plants with siphonogamous oogamy (II) Trachaeophytic heterosporous plants with archegonia (III) Archegoniates with zooidogamous oogamy
1 D, B, A
2 C, D, B
3 B, D, A
4 D, A, C
Explanation:
Trachaeophytes also called vascular plant possess lignified water- conducting tissue. Trachaeophytes have transport vessels, xylem and phloem. Ex. Eucalyptus, Cycas. -Heterosporous plants:- Megaspores and microspores are produced in the megasporangia and microsporangia respectively. The sporangia are borne on spirally arranged megasporophyll and microsporophyl. ex. Pinus cycus, Selaginella, salvia. - Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gamete (archegonium). Zooidogamy is found in algae, bryophytes, pteridophytes, and some gymnosperms. Ex. Marchantia, cycas, selaginella.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259829
In plant ' $A$ ', sporophyte is not free living, ' $B$ ' zygote represents short lived sporophyte, ' $C$ ' independent gametophyte and sporophytic generations. The organisms $A, B$ and $C$ are respectively
1 Volvox, Lycopodium, Marchantia
2 Lycopodium, Volvox, Marchantia
3 Marchantia, Volvox, Lycopodium
4 Marchantia, Lycopodium, Volvox
Explanation:
$\bullet$ Marchantia ;- Marchanitia is bryophytes in which the sporophyte is dependent an gametophyte that is why sporophyte is not free living. - The life cycle of volvox is haplontic i.e. the dominant stage in free living haploid (n) gamatophyte and sporophyte is represents only by the diploid zygote (n) In valvox sporophytic generation is represented only by the one called zygote. There are no-free living sporophytes. - Lycopodium :- Lycopodium is a sparophyte (2n) with distinct sporophytic (2n) and gametophytic (n) generations which alternate with each other.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259830
Choose the correct statement from the following.
1 A, B, C
2 B, C, D
3 A, B, D
4 A, C, D
Explanation:
A Xerarch succession is a form of plant succession starting in the bare ground that is very dry or is limited by the availability of water and eventually culminating in a mature forest. Such communities usually originate from extremely dry environments - such as rock deserts and sand dynes. Lichens produce rocks in Xerarch succussion and exude acide chemicals mosses like lichens have evolved to with sand severe drought. Algae are chlorophyllbearing, simple, thaloid, autotrophic and largely aquatic organisms. They occur in a variety of other habitats. Moist stones, soil and wood. Some of them also occur in association with fungi and animal exa - on sloth bear.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259832
Read the following statements regarding bryophytes and choose the incorrect option.
1 Gametophytic phase is dominant in life cycle
2 Fertilisation takes place in presence of water
3 Zygote undergoes meiosis to produce sporophyte
4 Sporophyte is physiologically dependent on gametophyte
Explanation:
A diploid zygote is formed after the process of fertilisation which undergoes many rounds of mitosis and give rise to a diploid multicellular sporophyte. The specialized cells of the sporophyte further undergoes meiosis form haploid spores. These spores develop into gametophytes. - The haploid stage, in which a multicellular haploid gametophyte develops from a spore and produces haploid gametes, is the dominant stage in the bryophyte life cycle.
259825
Choose the correct pair of taxa showing following sets of characters in sequence (I) Trachaeophytic heterosporous plants with siphonogamous oogamy (II) Trachaeophytic heterosporous plants with archegonia (III) Archegoniates with zooidogamous oogamy
1 D, B, A
2 C, D, B
3 B, D, A
4 D, A, C
Explanation:
Trachaeophytes also called vascular plant possess lignified water- conducting tissue. Trachaeophytes have transport vessels, xylem and phloem. Ex. Eucalyptus, Cycas. -Heterosporous plants:- Megaspores and microspores are produced in the megasporangia and microsporangia respectively. The sporangia are borne on spirally arranged megasporophyll and microsporophyl. ex. Pinus cycus, Selaginella, salvia. - Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gamete (archegonium). Zooidogamy is found in algae, bryophytes, pteridophytes, and some gymnosperms. Ex. Marchantia, cycas, selaginella.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259829
In plant ' $A$ ', sporophyte is not free living, ' $B$ ' zygote represents short lived sporophyte, ' $C$ ' independent gametophyte and sporophytic generations. The organisms $A, B$ and $C$ are respectively
1 Volvox, Lycopodium, Marchantia
2 Lycopodium, Volvox, Marchantia
3 Marchantia, Volvox, Lycopodium
4 Marchantia, Lycopodium, Volvox
Explanation:
$\bullet$ Marchantia ;- Marchanitia is bryophytes in which the sporophyte is dependent an gametophyte that is why sporophyte is not free living. - The life cycle of volvox is haplontic i.e. the dominant stage in free living haploid (n) gamatophyte and sporophyte is represents only by the diploid zygote (n) In valvox sporophytic generation is represented only by the one called zygote. There are no-free living sporophytes. - Lycopodium :- Lycopodium is a sparophyte (2n) with distinct sporophytic (2n) and gametophytic (n) generations which alternate with each other.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259830
Choose the correct statement from the following.
1 A, B, C
2 B, C, D
3 A, B, D
4 A, C, D
Explanation:
A Xerarch succession is a form of plant succession starting in the bare ground that is very dry or is limited by the availability of water and eventually culminating in a mature forest. Such communities usually originate from extremely dry environments - such as rock deserts and sand dynes. Lichens produce rocks in Xerarch succussion and exude acide chemicals mosses like lichens have evolved to with sand severe drought. Algae are chlorophyllbearing, simple, thaloid, autotrophic and largely aquatic organisms. They occur in a variety of other habitats. Moist stones, soil and wood. Some of them also occur in association with fungi and animal exa - on sloth bear.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259832
Read the following statements regarding bryophytes and choose the incorrect option.
1 Gametophytic phase is dominant in life cycle
2 Fertilisation takes place in presence of water
3 Zygote undergoes meiosis to produce sporophyte
4 Sporophyte is physiologically dependent on gametophyte
Explanation:
A diploid zygote is formed after the process of fertilisation which undergoes many rounds of mitosis and give rise to a diploid multicellular sporophyte. The specialized cells of the sporophyte further undergoes meiosis form haploid spores. These spores develop into gametophytes. - The haploid stage, in which a multicellular haploid gametophyte develops from a spore and produces haploid gametes, is the dominant stage in the bryophyte life cycle.
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Plant kingdom
259825
Choose the correct pair of taxa showing following sets of characters in sequence (I) Trachaeophytic heterosporous plants with siphonogamous oogamy (II) Trachaeophytic heterosporous plants with archegonia (III) Archegoniates with zooidogamous oogamy
1 D, B, A
2 C, D, B
3 B, D, A
4 D, A, C
Explanation:
Trachaeophytes also called vascular plant possess lignified water- conducting tissue. Trachaeophytes have transport vessels, xylem and phloem. Ex. Eucalyptus, Cycas. -Heterosporous plants:- Megaspores and microspores are produced in the megasporangia and microsporangia respectively. The sporangia are borne on spirally arranged megasporophyll and microsporophyl. ex. Pinus cycus, Selaginella, salvia. - Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gamete (archegonium). Zooidogamy is found in algae, bryophytes, pteridophytes, and some gymnosperms. Ex. Marchantia, cycas, selaginella.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259829
In plant ' $A$ ', sporophyte is not free living, ' $B$ ' zygote represents short lived sporophyte, ' $C$ ' independent gametophyte and sporophytic generations. The organisms $A, B$ and $C$ are respectively
1 Volvox, Lycopodium, Marchantia
2 Lycopodium, Volvox, Marchantia
3 Marchantia, Volvox, Lycopodium
4 Marchantia, Lycopodium, Volvox
Explanation:
$\bullet$ Marchantia ;- Marchanitia is bryophytes in which the sporophyte is dependent an gametophyte that is why sporophyte is not free living. - The life cycle of volvox is haplontic i.e. the dominant stage in free living haploid (n) gamatophyte and sporophyte is represents only by the diploid zygote (n) In valvox sporophytic generation is represented only by the one called zygote. There are no-free living sporophytes. - Lycopodium :- Lycopodium is a sparophyte (2n) with distinct sporophytic (2n) and gametophytic (n) generations which alternate with each other.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259830
Choose the correct statement from the following.
1 A, B, C
2 B, C, D
3 A, B, D
4 A, C, D
Explanation:
A Xerarch succession is a form of plant succession starting in the bare ground that is very dry or is limited by the availability of water and eventually culminating in a mature forest. Such communities usually originate from extremely dry environments - such as rock deserts and sand dynes. Lichens produce rocks in Xerarch succussion and exude acide chemicals mosses like lichens have evolved to with sand severe drought. Algae are chlorophyllbearing, simple, thaloid, autotrophic and largely aquatic organisms. They occur in a variety of other habitats. Moist stones, soil and wood. Some of them also occur in association with fungi and animal exa - on sloth bear.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259832
Read the following statements regarding bryophytes and choose the incorrect option.
1 Gametophytic phase is dominant in life cycle
2 Fertilisation takes place in presence of water
3 Zygote undergoes meiosis to produce sporophyte
4 Sporophyte is physiologically dependent on gametophyte
Explanation:
A diploid zygote is formed after the process of fertilisation which undergoes many rounds of mitosis and give rise to a diploid multicellular sporophyte. The specialized cells of the sporophyte further undergoes meiosis form haploid spores. These spores develop into gametophytes. - The haploid stage, in which a multicellular haploid gametophyte develops from a spore and produces haploid gametes, is the dominant stage in the bryophyte life cycle.
259825
Choose the correct pair of taxa showing following sets of characters in sequence (I) Trachaeophytic heterosporous plants with siphonogamous oogamy (II) Trachaeophytic heterosporous plants with archegonia (III) Archegoniates with zooidogamous oogamy
1 D, B, A
2 C, D, B
3 B, D, A
4 D, A, C
Explanation:
Trachaeophytes also called vascular plant possess lignified water- conducting tissue. Trachaeophytes have transport vessels, xylem and phloem. Ex. Eucalyptus, Cycas. -Heterosporous plants:- Megaspores and microspores are produced in the megasporangia and microsporangia respectively. The sporangia are borne on spirally arranged megasporophyll and microsporophyl. ex. Pinus cycus, Selaginella, salvia. - Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gamete (archegonium). Zooidogamy is found in algae, bryophytes, pteridophytes, and some gymnosperms. Ex. Marchantia, cycas, selaginella.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259829
In plant ' $A$ ', sporophyte is not free living, ' $B$ ' zygote represents short lived sporophyte, ' $C$ ' independent gametophyte and sporophytic generations. The organisms $A, B$ and $C$ are respectively
1 Volvox, Lycopodium, Marchantia
2 Lycopodium, Volvox, Marchantia
3 Marchantia, Volvox, Lycopodium
4 Marchantia, Lycopodium, Volvox
Explanation:
$\bullet$ Marchantia ;- Marchanitia is bryophytes in which the sporophyte is dependent an gametophyte that is why sporophyte is not free living. - The life cycle of volvox is haplontic i.e. the dominant stage in free living haploid (n) gamatophyte and sporophyte is represents only by the diploid zygote (n) In valvox sporophytic generation is represented only by the one called zygote. There are no-free living sporophytes. - Lycopodium :- Lycopodium is a sparophyte (2n) with distinct sporophytic (2n) and gametophytic (n) generations which alternate with each other.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259830
Choose the correct statement from the following.
1 A, B, C
2 B, C, D
3 A, B, D
4 A, C, D
Explanation:
A Xerarch succession is a form of plant succession starting in the bare ground that is very dry or is limited by the availability of water and eventually culminating in a mature forest. Such communities usually originate from extremely dry environments - such as rock deserts and sand dynes. Lichens produce rocks in Xerarch succussion and exude acide chemicals mosses like lichens have evolved to with sand severe drought. Algae are chlorophyllbearing, simple, thaloid, autotrophic and largely aquatic organisms. They occur in a variety of other habitats. Moist stones, soil and wood. Some of them also occur in association with fungi and animal exa - on sloth bear.
AP EAMCET-28.04.2017 Shift-II
Plant kingdom
259832
Read the following statements regarding bryophytes and choose the incorrect option.
1 Gametophytic phase is dominant in life cycle
2 Fertilisation takes place in presence of water
3 Zygote undergoes meiosis to produce sporophyte
4 Sporophyte is physiologically dependent on gametophyte
Explanation:
A diploid zygote is formed after the process of fertilisation which undergoes many rounds of mitosis and give rise to a diploid multicellular sporophyte. The specialized cells of the sporophyte further undergoes meiosis form haploid spores. These spores develop into gametophytes. - The haploid stage, in which a multicellular haploid gametophyte develops from a spore and produces haploid gametes, is the dominant stage in the bryophyte life cycle.