In mosses vegetative reproduction takes place by fragmentation & budding in

1. Primary protonema.

2. Secondary protonema.

3. Rhizoids.

4. Both 1 and 2.

Subtopic:  Bryophytes |
 83%
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Read the following and choose the incorrect statement

1. Majority of red algae are marine with greater concentrations found in the warmer areas.

2. Thallus of Marchantia is dorsiventral and closely appressed to the substrate.

3. In Sequoia, reduced male gametophyte is called pollen grain and its endosperm represents future sporophytes.

4. Wolfia is the smallest flowering plant.

Subtopic:  Gymnosperms: I | Gymnosperms |
 77%
From NCERT
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Study the figure and find out an incorrect statement.

1. Contains laminarin or mannitol as reserve food.

2. Life-cycle is diplontic.

3. Union of gamete may take place in water or within the oogonium.

4. Gametes with two apically inserted flagella.

Subtopic:  Algae |
 72%
From NCERT
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Pinus seed cannot germinate and establish without fungal association. This is because:

1.  its seeds contain inhibitors that prevent germination.

2.  its embryo is immature.

3.  it has obligate association with mycorrhizae.

4.  it has very hard seed coat.

Subtopic:  Gymnosperms: I | General Accounts of Gymnosperms: II | Gymnosperms |
 93%
From NCERT
NEET - 2019
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From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :

1. Gymnosperms

2. Liverworts

3. Mosses

4. Pteridophytes

Subtopic:  Pteridophytes: Heterospory | Pteridophytes |
 77%
From NCERT
NEET - 2019
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Choose the incorrect statement:-

1.  Gametophyte of Gymnosperm are always Dioecious

2.  Sporophyte of Gymnosperm are always heterosporous.

3.  Sporophyte of pteridophytes may be monoecious or dioecious.

4.  Gametophyte of pteridophytes may be monoecious or dioecious.

Subtopic:  Gymnosperms: I | General Accounts of Gymnosperms: II | Gymnosperms |
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Choose the incorrect match from following:-

1.  Cycas-branched stem.

2.  Salvinia-heterosporous sporophyte.

3.  Marchantia-Elaters.

4.  Chlorella-used by space travellers.

Subtopic:  Gymnosperms: I | Gymnosperms |
 89%
From NCERT
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Assertion: Seeds are formed in Gymnosperms.

Reason: Female gametophyte is retained within megasporangium in Gymnosperms.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Gymnosperms: I | General Accounts of Gymnosperms: II | Gymnosperms |
 62%
From NCERT
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Find out the incorrect statement about the
Rhodophyceae.
1. Majority are marine with greater concentrations
found in the warmer areas.

2. They are also found at great depths of oceans
where relatively little light penetrates.

3. Usually reproduce vegetatively by fragmentation.

4. They reproduce asexually by biflagellate
zoospores.

Subtopic:  Rhodophyceae: Red Algae and Importance of Algae |
 87%
From NCERT
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Coralloid roots of gymnosperms are/have
(1) Irregular and possess large number of roots hairs.
(2) Symbiotic association with Rhizobium.
(3) Symbiotic association with N2 - fixing cyanobacteria. 
(4) VAM

Subtopic:  Gymnosperms: I | General Accounts of Gymnosperms: II | Gymnosperms |
 90%
From NCERT
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