Examples of heterosporous pteridophytes -Biology

Examples of heterosporous pteridophytes -Biology
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Difference between homosporous and heterosporous pteridophytes -Biology

Description : Difference between homosporous and heterosporous pteridophytes -Biology

Last Answer : answer:

Distinguish between homosporous and heterosporous condition in pteridophytes.

Description : Distinguish between homosporous and heterosporous condition in pteridophytes. 

Last Answer : Ans: Majority of pteridophytes are homosporous.All spores produced od similar type. Example: Psilotum Heterosporous pteridophytes produce macro and microspores. Example: Selaginella. 

Examples of homosporous pteridophytes. -Biology

Description : Examples of homosporous pteridophytes. -Biology

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Examples of pteridophytes plants? -Biology

Description : Examples of pteridophytes plants? -Biology

Last Answer : answer:

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.

Last Answer : The significant characteristic acquired by pteridophytes is vascular tissues (xylem and phloem). Ex: Nephrolepis, Selaginella, Adiantum, Lycopodium, Marsilea

Consider the following statements: Marchantia polymorpha (1) Is dioecious (2) Possesses antheridiophores and archegoniophores (3) Lacks foot and seta in its sporophyte (4) Is heterosporous

Description : Consider the following statements: Marchantia polymorpha (1) Is dioecious (2) Possesses antheridiophores and archegoniophores (3) Lacks foot and seta in its sporophyte (4) Is heterosporous

Last Answer : Ans. ((b))

.Consider the following four statements whether they are correct or wrong. A. The sporophyte in liverworts is more elaborate than that in mosses. B. Salvinia is heterosporous. C. The life-cycle in all seed-bearing plants is diplontic. D. In Pinus, male and female cones are borne on different trees. The two wrong statements together are (a) A and C (b) A and D (c) B and C (d) A and B

Description : .Consider the following four statements whether they are correct or wrong. A. The sporophyte in liverworts is more elaborate than that in mosses. B. Salvinia is heterosporous. C. The life-cycle in all seed-bearing plants is diplontic ... are (a) A and C (b) A and D (c) B and C (d) A and B

Last Answer : (b) A and D

Read the following statements (A – E) and answer the question which follows them. (A) In liverworts, mosses and ferns gametophytes are free-living. (B) Gymnosperms and some ferns are heterosporous. (C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous. (D)The sporophyte in liverworts is more elaborate than that in mosses. (E) Both, Pinus and Marchantia are dioecious. How many of the above statements are correct? (a) Three (b) Four (c) One (d) Two

Description : Read the following statements (A - E) and answer the question which follows them. (A) In liverworts, mosses and ferns gametophytes are free-living. (B) Gymnosperms and some ferns are heterosporous. (C) Sexual ... How many of the above statements are correct? (a) Three (b) Four (c) One (d) Two

Last Answer : (a) Three

Select the correct statement. (a) Sequoia is one of the tallest trees. (b) The leaves of gymnosperms are not well adapted to extremes of climate.(c) Gymnosperms are both homosporous and heterosporous. (d) Salvinia, Ginkgo and Pinus all are gymnosperms.

Description : Select the correct statement. (a) Sequoia is one of the tallest trees. (b) The leaves of gymnosperms are not well adapted to extremes of climate. (c) Gymnosperms are both homosporous and heterosporous. (d) Salvinia, Ginkgo and Pinus all are gymnosperms.

Last Answer : (a) Sequoia is one of the tallest trees.

Select the mismatch. (a) Cycas – Dioecious (b) Salvinia – Heterosporous (c) Equisetum – Homosporous (d) Pinus – Dioecious

Description : Select the mismatch. (a) Cycas – Dioecious (b) Salvinia – Heterosporous (c) Equisetum – Homosporous (d) Pinus – Dioecious

Last Answer : (d) Pinus – Dioecious

Which of the following statements is correct? (a) Ovules are not enclosed by ovary wall in gymnosperms. (b) Selaginella is heterosporous, while Salvinia is homosporous. (c) Horsetails are gymnosperms. (d) Stems are usually unbranched in both Cycas and Cedrus.

Description : Which of the following statements is correct? (a) Ovules are not enclosed by ovary wall in gymnosperms. (b) Selaginella is heterosporous, while Salvinia is homosporous. (c) Horsetails are gymnosperms. (d) Stems are usually unbranched in both Cycas and Cedrus.

Last Answer : (a) Ovules are not enclosed by ovary wall in gymnosperms.

Evolutionary important character of Selaginella is (a) heterosporous nature (b) rhizophore (c) strobili (d) ligule.

Description : Evolutionary important character of Selaginella is (a) heterosporous nature (b) rhizophore (c) strobili (d) ligule.

Last Answer : (a) heterosporous nature

Which one of the following is heterosporous? (a) Adiantum (b) Equisetum (c) Dryopteris (d) Salvinia

Description : Which one of the following is heterosporous? (a) Adiantum (b) Equisetum (c) Dryopteris (d) Salvinia

Last Answer : (d) Salvinia

Select the mismatch (1) Cycas – Dioecious (2) Salvinia – Heterosporous (3) Equisetum – Homosporous (4) Pinus – Dioecious

Description : Select the mismatch (1) Cycas – Dioecious (2) Salvinia – Heterosporous (3) Equisetum – Homosporous (4) Pinus – Dioecious

Last Answer : (4) Pinus – Dioecious

Which of the following statement is correct ? (1) Ovules are not enclosed by ovary wall in gymnosperms (2) Selaginella is heterosporous, while Salvinia is homosporous (3) Horsetails are gymnosperms (4) Stems are usually unbranched in both Cycas and Cedrus

Description : Which of the following statement is correct ? (1) Ovules are not enclosed by ovary wall in gymnosperms (2) Selaginella is heterosporous, while Salvinia is homosporous (3) Horsetails are gymnosperms (4) Stems are usually unbranched in both Cycas and Cedrus

Last Answer : (1) Ovules are not enclosed by ovary wall in gymnosperms

Why the sporophyte of gymnosperm is heterosporous?

Description : Why the sporophyte of gymnosperm is heterosporous?  

Last Answer : Ans: Sporophyte produces two types of spores like smaller micro spores and larger mega spores so it is heterosporous.  

Similarities between bryophytes and pteridophytes? -Biology

Description : Similarities between bryophytes and pteridophytes? -Biology

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Characteristics of pteridophytes. -Biology

Description : Characteristics of pteridophytes. -Biology

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Where are pteridophytes found? -Biology

Description : Where are pteridophytes found? -Biology

Last Answer : Most Pteridophytes are terrestrial and grows in moist and shady places while some flourish well in open dry places. Pteridophyta do not produce seeds but they produce spores. Spores are produced by leaves, usually in under surface of leaves.

Economic importance of pteridophytes. -Biology

Description : Economic importance of pteridophytes. -Biology

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Pteridophytes reproduction. -Biology

Description : Pteridophytes reproduction. -Biology

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Classification of pteridophytes. -Biology

Description : Classification of pteridophytes. -Biology

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Heterospory in pteridophytes? -Biology

Description : Heterospory in pteridophytes? -Biology

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$ Tracheophytes are the plants with vascular tissues. ! Tracheophytes are of three types (i) Pteridophytes (ii) Gymnosperms (iii) Angiosperms

Description : $ Tracheophytes are the plants with vascular tissues. ! Tracheophytes are of three types (i) Pteridophytes (ii) Gymnosperms (iii) Angiosperms

Last Answer : $ Tracheophytes are the plants with vascular tissues. ! Tracheophytes are of three types (i) Pteridophytes (ii ... D. If both As and R are wrong.

$ Cryptogams are those plants which have large sized sex organs. ! Pteridophytes are the cryptogams without embryo formation.

Description : $ Cryptogams are those plants which have large sized sex organs. ! Pteridophytes are the cryptogams without embryo formation.

Last Answer : $ Cryptogams are those plants which have large sized sex organs. ! Pteridophytes are the cryptogams without embryo ... D. If both As and R are wrong.

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

Mention one example each of aquatic and xerophytic pteridophytes.

Description : Mention one example each of aquatic and xerophytic pteridophytes.

Last Answer : Mention one example each of aquatic and xerophytic pteridophytes.

Write economic importance of Pteridophytes.

Description : Write economic importance of Pteridophytes.

Last Answer : Write economic importance of Pteridophytes.

Compare the gametophyte and sporophyte of Bryophytes with that of Pteridophytes.

Description : Compare the gametophyte and sporophyte of Bryophytes with that of Pteridophytes.

Last Answer : Compare the gametophyte and sporophyte of Bryophytes with that of Pteridophytes.

Double fertilization is found in: (a) Bryophytes (b) Angiosperms (c) Gymnosperms (d) Pteridophytes

Description : Double fertilization is found in: (a) Bryophytes (b) Angiosperms (c) Gymnosperms (d) Pteridophytes

Last Answer : Ans. ((b))

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

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

Last Answer : Prothallus.

The adult plant body in pteridophytes is

Description : The adult plant body in pteridophytes is

Last Answer : sporophyte.

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.

Last Answer : The process by which gametophyte and sporophyte formed alternately during the life cycle is called alternation of generations. The life cycle of pteridophytes includes two successive generations namely a ... . Fusion of male and female gametes results in zygote which develops into a sporophyte

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.

What is sporophyte of pteridophytes?

Description : What is sporophyte of pteridophytes?

Last Answer : Sporophyte is the adult plant body in pteridophytes.

Mention the characteristics of pteridophytes.

Description : Mention the characteristics of pteridophytes.

Last Answer : a) Pteridophytes are vascular plants. b) They were the first terrestrial plants to develop vascular tissues. c) They grow in moist soil, on damp walls, cool & shady regions. The plant body ... is by fusion of male and female gametes. Ex: Nephrolepis, Selaginella, Adiantum, Lycopodium, Marsilea.

Give reason: Pteridophytes are included under tracheophytes.

Description : Give reason: Pteridophytes are included under tracheophytes.

Last Answer : As pteridophytes have vascular tissues, they are included under tracheophytes.

What are Pteridophytes?

Description : What are Pteridophytes?

Last Answer : Pteridophytes are vascular plants. They are the first terrestrial plants to develop vascular tissues.

Give the characteristics of Pteridophytes?

Description : Give the characteristics of Pteridophytes?  

Last Answer : i) The plant body of Pteridophytes has true roots, stem and leaves. ii) They have vascular tissues. iii) They do not bear flowers, fruits and seeds. iv) Both sporophyte and gametophyte generations are independent and free living. v) The gametophyte is much reduced and smaller in size. 

Pollination occurs in (a) bryophytes and angiosperms (b) pteridophytes and angiosperms (c) angiosperms and gymnosperms (d) angiosperms and fungi.

Description : Pollination occurs in (a) bryophytes and angiosperms (b) pteridophytes and angiosperms (c) angiosperms and gymnosperms (d) angiosperms and fungi.

Last Answer : (c) angiosperms and gymnosperm

.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

Description : .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

Last Answer : d) bryophytes and pteridophytes.

A plant having seeds but lacking flowers and fruits belongs to (a) pteridophytes (b) mosses (c) ferns (d) gymnosperms.

Description : A plant having seeds but lacking flowers and fruits belongs to (a) pteridophytes (b) mosses (c) ferns (d) gymnosperms.

Last Answer : (d) gymnosperms.

.Multicellular branched rhizoids and leafy gametophytes are the characteristics of (a) some bryophytes (b) pteridophytes (c) all bryophytes (d) gymnosperms.

Description : .Multicellular branched rhizoids and leafy gametophytes are the characteristics of (a) some bryophytes (b) pteridophytes (c) all bryophytes (d) gymnosperms.

Last Answer : (a) some bryophytes

In which of the following would you place the plants having vascular tissue lacking seeds? (a) Pteridophytes (b) Gymnosperms (c) Algae (d) Bryophytes

Description : In which of the following would you place the plants having vascular tissue lacking seeds? (a) Pteridophytes (b) Gymnosperms (c) Algae (d) Bryophytes

Last Answer : (a) 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.

Description : 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 ... are present in pteridophytes. (d) Origin of seed habit can be traced in pteridophytes.

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

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

Description : 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 ... D and E (b) B, C and E (c) A, C and D (d) B, C and D

Last Answer : (a) A, D and E