The independent structure developed in pteridophytes which produces male and female gametes is

The independent structure developed in pteridophytes which produces male and female

gametes is
by

1 Answer

Answer :

Prothallus.
by

Related questions

In bryophytes and pteridophytes, transport of male gametes requires

Description : In bryophytes and pteridophytes, transport of male gametes requires

Last Answer : In bryophytes and pteridophytes, transport of male gametes requires (A) Birds (B) Water (C) Wind (D) Insects

In bryophytes and pteridophytes, transport of male gametes requires (a) birds (b) water (c) wind (d) insects

Description : In bryophytes and pteridophytes, transport of male gametes requires (a) birds (b) water (c) wind (d) insects

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Read the following five statements (A to E) and select the option with all correct statements. A. Mosses and lichens are the first organisms to colonise a bare rock. B. Selaginella is a homosporous pteridophyte. C. Coralloid roots in Cycas have VAM. D. Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic. E. In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte. (a) A, D and E (b) B, C and E (c) A, C and D (d) B, C and D

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Last Answer : (a) A, D and E

Pteridophytes differ from mosses/bryophytes in possessing (a) independent gametophyte (b) well developed vascular system (c) archegonia (d) flagellate spermatozoids.

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Read the following five statements (A – E) and answer as asked next to them. (A) In Equisetum, the female gametophyte is retained on the parent sporophyte. (B) In Ginkgo, male gametophyte is not independent. (C) The sporophyte in Riccia is more developed than that in Polytrichum. (D) Sexual reproduction in Volvox is isogamous. (E) The spores of slime moulds lack cell walls. How many of the above statements are correct? (a) Two (b) Three (c) Four (d) One

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In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote? -Biology

Description : In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote? -Biology

Last Answer : The number of chromosome in the female gamete would be same as that in the male gamete, i.e., it will have 24 chromosomes. The number of chromosome in the zygote would be double the number present in the gamete and hence, it would be 48.

How are male and female gametes production different?

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Last Answer : In males 4 sperms are produced from one cell while in female 1egg and 3 polar bodies are produced in mammals .

What are the reproductive organs that produce gametes in both male and female?

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Last Answer : That would be the Gonads.

Erythroblastosis fetalis is caused when fertilisation takes place between gametes of (a) Rh– female and Rh+ male (b) Rh+ female and Rh– male (c) Rh+ female and Rh+ male (d) Rh– female and Rh– male.

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Last Answer : (a) Rh– female and Rh+ male

.A well developed archegonium with neck consisting of 4-6 rows and neck canal cells, characterises (a) gymnosperms and flowering plants (b) pteridophytes and gymnosperms (c) gymnosperms only (d) bryophytes and pteridophytes

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Last Answer : d) bryophytes and pteridophytes.

Which one of the following is a correct statement? (a) Pteridophyte gametophyte has a protonemal and leafy stage. (b) In gymnosperms, female gametophyte is free- living. (c) Antheridiophores and archegoniophores are present in pteridophytes. (d) Origin of seed habit can be traced in pteridophytes.

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Last Answer : (d) Origin of seed habit can be traced in pteridophytes.

85. Which one of the following is a correct statement ? (1) Origin of seed habit can be traced in pteridophytes (2) Pteridophyte gametophyte has a protonemal and leafy stage (3) In gymnosperms female gametophyte is free-living (4) Antheridiophores and archegoniophores are present in pteridophytes

Description : 85. Which one of the following is a correct statement ? (1) Origin of seed habit can be traced in pteridophytes (2) Pteridophyte gametophyte has a protonemal and leafy stage (3) In gymnosperms female gametophyte is free-living (4) Antheridiophores and archegoniophores are present in pteridophytes

Last Answer : Origin of seed habit can be traced in pteridophytes

You’re stranded in a rainforest, and you’ve eaten a poisonous mushroom. To save your life, you need an antidote excreted by a certain species of frog. Unfortunately, only the female frog produces the antidote. The male and female look identical, but the male frog has a distinctive croak. Derek Abbott shows how to use conditional probability to make sure you lick the right frog and get out alive. -Riddles

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Last Answer : If you chose to go to the clearing, you're right, but the hard part is correctly calculating your odds. There are two common incorrect ways of solving this problem. Wrong answer number one: ... best options so that maybe next time, we can avoid eating that poisonous mushroom in the first place.

.Male and female gametophytes are independent and free-living in (a) mustard (b) castor (c) Pinus (d) Sphagnum.

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. In which one of the following male and female gametophytes do not have free living independent existence? (a) Polytrichum (b) Cedrus (c) Pteris (d) Funaria

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In gymnosperms, the male gametes are produced in structures called

Description : In gymnosperms, the male gametes are produced in structures called

Last Answer : microsporophyll.

Where are Male gametes are produced?

Description : Where are Male gametes are produced?

Last Answer : Need answer

Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.

Description : Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.

Last Answer : (a) two polar nuclei and one male gamete

In angiosperms, pollen tube liberate their male gametes into the (a) central cell (b) antipodal cells (c) egg cell (d) synergids.

Description : In angiosperms, pollen tube liberate their male gametes into the (a) central cell (b) antipodal cells (c) egg cell (d) synergids.

Last Answer : d) synergids.

Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.

Description : Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.

Last Answer : (d) syngamy and triple fusion.

What is the fate of the male gametes discharged in the synergid? (a) One fuses with the egg and other fuses with central cell nuclei. (b) One fuses with the egg, other(s) degenerates in the synergid. (c) All fuse with the egg. (d) One fuses with the egg, other(s) fuse(s) with synergid nucleus.

Description : What is the fate of the male gametes discharged in the synergid? (a) One fuses with the egg and other fuses with central cell nuclei. (b) One fuses with the egg, other(s) degenerates in the synergid. (c) All fuse with the egg. (d) One fuses with the egg, other(s) fuse(s) with synergid nucleus.

Last Answer : (a) One fuses with the egg and other fuses with central cell nuclei.

Male gametes in angiosperms are formed by the division of (a) generative cell (b) vegetative cell (c) microspore mother cell (d) microspore.

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Last Answer : (a) generative cell

What is the function of germ pore? (a) Emergence of radicle (b) Absorption of water for seed germination (c) Initiation of pollen tube (d) Release of male gametes

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Last Answer : (c) Initiation of pollen tube

The plant parts which consist of two generations- one within the other (1) pollen grains inside the anther (2) germinated pollen grain with two male gametes (3) seed inside the fruit (4) embryo sac inside the ovule (a) (1) only (b) (1), (2), and (3) (c) (3) and (4)

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Last Answer : (d) (1) and (4).

Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characterised features of (a) cycads (b) conifers (c) polypetalous angiosperms (d) gamopetalous angiosperms.

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Flagellated male gametes are present in all the three of which one of the following sets? (a) Zygnema, Saprolegnia and Hydrilla (b) Fucus, Marsilea and Calotropis (c) Riccia, Dryopteris and Cycas (d) Anthoceros, Funaria and Spirogyra

Description : Flagellated male gametes are present in all the three of which one of the following sets? (a) Zygnema, Saprolegnia and Hydrilla (b) Fucus, Marsilea and Calotropis (c) Riccia, Dryopteris and Cycas (d) Anthoceros, Funaria and Spirogyra

Last Answer : (c) Riccia, Dryopteris and Cycas

Male gametes are flagellated in (a) Ectocarpus (b) Spirogyra (c) Polysiphonia (d) Anabaena

Description : Male gametes are flagellated in (a) Ectocarpus (b) Spirogyra (c) Polysiphonia (d) Anabaena

Last Answer : (a) Ectocarpus

Double fertilization is (1) Fusion of two male gametes of a pollen tube with two different eggs (2) Fusion of one male gamete with two polar nuclei (3) Fusion of two male gametes with one egg (4) Syngamy and triple fusion

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Last Answer : (4) Syngamy and triple fusion

Which of the following is not a characteristic of coniferales........ a)pycnoxylic wood b)motile male gametes c)presence of resin canal d) fertilization siphonogamous

Description : Which of the following is not a characteristic of coniferales........ a)pycnoxylic wood b)motile male gametes c)presence of resin canal d) fertilization siphonogamous

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Assertion: Several organisms belonging to monera,fungi,algae and bryophytes produces gametes by mitosis. Reason: the plant body of the monera, fungi,a

Description : Assertion: Several organisms belonging to monera,fungi,algae and bryophytes produces gametes by mitosis. Reason: the plant body of the monera, fungi,a

Last Answer : Assertion: Several organisms belonging to monera,fungi,algae and bryophytes produces gametes by mitosis. ... , fungi,algae and bryophytes is haploid.

In the metagenesis of Aurelia and Obelia what is the form that produces gametes? What is the form that reproduces asexually?

Description : In the metagenesis of Aurelia and Obelia what is the form that produces gametes? What is the form that reproduces asexually?

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In a moss, the sporophyte (a) manufactures food for itself, as well as for the gametophyte (b) is partially parasitic on the gametophyte(c) produces gametes that give rise to the gametophyte (d) arises from a spore produced from the gametophyte.

Description : In a moss, the sporophyte (a) manufactures food for itself, as well as for the gametophyte (b) is partially parasitic on the gametophyte (c) produces gametes that give rise to the gametophyte (d) arises from a spore produced from the gametophyte.

Last Answer : (b) is partially parasitic on the gametophyte

In gymnosperms, the female gametes are produced in structures called

Description : In gymnosperms, the female gametes are produced in structures called

Last Answer : megasporophyll.

Match column I with column II and select the correct option using the codes given below. Column I Column II A. Pistils fused together (i) Gametogenesis B. Formation of gametes (ii) Pistillate C. Hyphae of higher (iii) Syncarpous ascomycetes D. Unisexual female (iv) Dikaryotic flower (a) A-(iv), B-(iii), C-(i), D-(ii) (b) A-(ii), B-(i), C-(iv), D-(iii) (c) A-(i), B-(ii), C-(iv), D-(iii) (d) A-(iii), B-(i), C-(iv), D-(ii)

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Last Answer : (d) A-(iii), B-(i), C-(iv), D-(ii)

The number of mature gametes resulting from meiosi in the female is: a) 1 b) 2 c) 3 d) 4

Description : The number of mature gametes resulting from meiosi in the female is: a) 1 b) 2 c) 3 d) 4

Last Answer : ANSWER: A -- 1 

List all homologous structure of human male and female reproductive system. -Biology

Description : List all homologous structure of human male and female reproductive system. -Biology

Last Answer : answer:

In the female which structure is homologous to penis of male :-

Description : In the female which structure is homologous to penis of male :-

Last Answer : In the female which structure is homologous to penis of male :- A. Cervix B. Vagina C. Uterus D. Clitoris

How can you describe the structure and function of the male and female reproductive parts of a typical flower?

Description : How can you describe the structure and function of the male and female reproductive parts of a typical flower?

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The male Japanese beetle breaks down female pheromones. What structure inside the cell of the male beetle breaks down the pheromone?

Description : The male Japanese beetle breaks down female pheromones. What structure inside the cell of the male beetle breaks down the pheromone?

Last Answer : Lysosomes (Apex)

Conglobate gland is a leaf like structure found in – (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Description : Conglobate gland is a leaf like structure found in – (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Last Answer : (2) Male Cockroach Explanation: Conglobate gland is a leaf like, median, unbranched gland of male cockroach. It lies below the ejaculatory duct and open into the genital pouch close to the male genital aperture.

Select the wrong statement. (a) In oomycetes, female gamete is smaller and motile, while male gamete is larger and non- motile. (b) Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy. (c) Isogametes are similar in structure, function and behaviour. (d) Anisogametes differ either in structure, function or behaviour.

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Last Answer : (a) In oomycetes, female gamete is smaller and motile, while male gamete is larger and non- motile.

Conglobate gland is a leaf like structure found in (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Description : Conglobate gland is a leaf like structure found in (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Last Answer : Male Cockroach

Which of the following are mostly woody trees, always perennials and never herbs or annuals? (a) Angiosperms (b) Gymnosperms (c) Pteridophytes (d) Bryophytes

Description : Which of the following are mostly woody trees, always perennials and never herbs or annuals? (a) Angiosperms (b) Gymnosperms (c) Pteridophytes (d) Bryophytes

Last Answer : Ans:(b)

Our major foods, fibres, spices, fruits and beverage crops are (a) Flowering plants (b) Gymnospermous plants (c) Pteridophytes (d) Bryophytes

Description : Our major foods, fibres, spices, fruits and beverage crops are (a) Flowering plants (b) Gymnospermous plants (c) Pteridophytes (d) Bryophytes

Last Answer : Ans:(a)

The adult plant body in pteridophytes is

Description : The adult plant body in pteridophytes is

Last Answer : sporophyte.

What is the significant characteristic acquired by pteridophytes in the process of evolution? Give 2 examples of pteridophytes.

Description : What is the significant characteristic acquired by pteridophytes in the process of evolution? Give 2 examples of pteridophytes.

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Mention the economic importance of pteridophytes/ferns.

Description : Mention the economic importance of pteridophytes/ferns.

Last Answer : a) Ferns are grown for their ornamental value. b) Leaves of pteridophytes are used in making flower bouquet. c) Some ferns are of medicinal importance. d) Some ferns like horse-tail and club mosses are involved in the formation of fossil fuels like coal and petroleum.

Explain alternation of generations in pteridophytes.

Description : Explain alternation of generations in pteridophytes.

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How do pteridophytes reproduce sexually?

Description : How do pteridophytes reproduce sexually?

Last Answer : Prothallus an independent structure produces male and female gametes called antheridia and archegonia. The gametes fuse and forms zygote developing into a sporophyte.

How do pteridophytes reproduce asexually?

Description : How do pteridophytes reproduce asexually?

Last Answer : Pteridophytes reproduce asexually by producing haploid spores. The spores germinate into a haploid gametophyte.