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Protonema is...

Protonema is

A

A structure in pteridophytes formed before the thallus develops

B

A sporophytic free living structure formed in pteridophytes

C

A creeping, green, filamentous and gametophytic structure produced in bryophytes.

D

A primitive strucures formed after fertilization in pteriodophytes.

Text Solution

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The correct Answer is:
C
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Explore conceptually related problems

Read the following statements carefully (i) Protonema is found in mosses and is absent in liverworts. (ii) In Marchantia,the sporophyte is divided into the foot, seta and capsule (iii) Archegonia are partially embedded in pteridophytes (iv) Gymnosperms do not possess vessels in xylem except in some gnetophytes.

Explain briefly the following terms with suitabe examples: (i) Protonema (ii) Antheridium (iii) Archegonium (iv) Diplontic (v) Sporophyll (vi) Isogamy

Consider the following structures/characters: (i) Multicellular asexual buds (ii) Protonema stage (iii) Sporic meiosis (iv) Peristome in sporophyte (V) Multiflagellate sperms (vi) Vascular amphibians of plant kingdom . The structures/characters concerned with the life cycle of liverworts are:

Protonema and prothallus are respectively:-

protonema in mosses and prothallus for ferns resemble with each other in

What is correct? (a) Protonema of moss and prothallus of Dryopteris are sporophytic (b) Protonema of mos and prothallus of Dryopteris are gametophytic (c) Moss protonema is sporophytic, Pteris prothallus is gametophytic but plant body of Pteris and Funaria are gametophytic (d) Plant body of moss is gametophytic while that of Dryopteris is both gametophytic and sporophytic

The leafy stage of moss develops from 1 Spore germination 2 Primary protonema as an apical bud 3 Secondary protonema as a lateral bud 4 Fragments of unbranched rhizoids

What is the chromosome number in calyptra, perichaetial cells, columella and protonema if endothecium cell contains 20 chromosomes?

What is the correct ploidy sequence in the following ? (A) Protonema cell of moss (B) ovum of liverworts (C) Roots cell of Pteridophyta (D) Gymnospermic endosperm

Statement-A: The mosses have an elaborate mechanism of spore dispersal. Statement-B: Leafy stage in mosses develops from secondary protonema as an apical bud.

ALLEN-DIVERSITY IN LIVING WORLD (PLANT DIVERSITY)-EXERCISE -III
  1. Classification system are chaning every now and then because an attemp...

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  2. In potato, brinjal, lion, leopard, and tiger, how many species and gen...

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  3. The correct sequences of evolutions is :-

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  4. Suffix is not used for:-

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  5. Some characters are given below. Which of them are true for the cyanob...

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  6. Which of the following is non-cellular organisms?

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  7. Find the incorrect match:-

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  8. Select incorrect statement about fungi?

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  9. Find the correct statements about fungi:- a) most of the fungi are s...

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  10. Choose the incorrect statement regarding decomposer:-

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  11. With respect to fungal sexual cycle, choose the correct sequence of ev...

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  12. For Bryophytes, select the incorrect statement in the following:

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  13. Which of the following is not a character related to Red Algae?

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  14. Select the incorrect from the following.

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  15. Oogamous type of sexual reproduction is found in (a) Chlamydomonas ...

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  16. A plant shows thallus level, of organisation. It shows rhizoids and is...

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  17. Protonema is

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  18. Read the following statements and select the correct option:- A. Gym...

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  19. Pollen grains after dispersed from the anthers are carried to the stig...

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  20. Diplontic life cycle is found in:-

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