Which of the following statements regarding gymnosperms are correct?

I. Ovules are naked - not enclosed by any ovary wall before fertilisation but seeds that develop after fertilisation are covered.

II. In all living Gymnosperms, sporophyte is dominant over the gametophyte.

III. They are hetrosporous.

IV. The male and female gametophytes do not have an independent existence.

1. I, II and III

2. I, III and IV

3. II, III and IV

4. I, II, III and IV

Subtopic:  General Accounts of Gymnosperms:II | Gymnosperms |
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Which of the following algae is likely to be found in the deepest waters?

(a) Green

(b) Brown

(c) Red

(d) All are found at equal depths

Subtopic:  Rhodophyceae: Red Algae and Importance of Algae |
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Which pair[s] is/are in incorrectly matched?

I. Phaeophyceae - Algin in cell wall

II. Chlorophyceae - Laminarin is stored food

III. Rhodophyceae - 2, unequal, lateral flagella

(1) Only II

(2) Only III

(3) I and II only

(4) II and III only

Subtopic:  Chlorophyceae: Green Algae:I | Pheophyceae:Brown Algae | Rhodophyceae: Red Algae and Importance of Algae | Chlorophyceae: Green Algae |
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The gemmae produced by some liverworts function as:

(1) A water gathering structure

(2) A light capturing structure

(3) A sexual structure

(4) An asexual structure

Subtopic:  Bryophytes (Liverworts) |
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All the following differentiate gymnosperms from the higher cryptogams except:

(1) Presence of an independent green gametophyte

(2) development of an ovule

(3) Formation of the pollen tube

(4) Presence of cambium

Subtopic:  Gymnosperms: I | General Accounts of Gymnosperms:II | Gymnosperms |
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Heterosporous ferns include both:

(1) Lycopodium and Equisetum

(2) Selaginella and Salvinia

(3) Psilotum and Phylloglossum

(4) Selaginella and Equisetum

Subtopic:  Pteridophytes: Heterospory |
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The life cycle is not haplo-diplontic in:

(1) Bryophytes

(2) Pteridophytes

(3) Polysiphonia

(4) Fucus

Subtopic:  Life Cycle Patterns in Plants |
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Asexaul reproduction by pear shaped biflagellate zoospores is seen in most:

1. Green algae

2. Brown algae

3. Red algae

4. Both (2) and (3)

Subtopic:  Pheophyceae:Brown Algae |
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All the following pteriodophytes belong to the Class Pteropsida except:

1. Dryopteris

2. Pteris

3. Selaginella

4. Adiantum

Subtopic:  Classification of Pteridophytes: II | Classification of Pteridophytes |
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Sexual reproduction by non-flagellated but similar in size gametes is seen in:

1. Chlamydomonas

2. Volvox

3. Spirogyra

4. Fucus

Subtopic:  Algae |
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