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Select the correct statement.

(1) Salvinia, Ginkgo and Pinus all are gymnosperms

(2) Sequoia is one of the tallest trees

(3) The leaves of gymnosperms are not well adapted to extremes of climate

(4) Gymnosperms are both homosporous and heterosporous

Subtopic:  General Accounts of Gymnosperms: II | Examples of Gymnosperms | Gymnosperms |
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NEET - 2016
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Conifers are adapted to tolerate extreme environmental conditions because of

1. broad hardy leaves 2. superficial stomata
3. thick cuticle 4. the presence of vessels
Subtopic:  Examples of Gymnosperms |
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Double fertilisation is exhibited by

(1) gymnosperms

(2) algae

(3) fungi

(4) angiosperms

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An example of colonial alga is

1. Chlorella

2. Volvox

3. Ulothrix

4. Spirogyra

Subtopic:  Algae |
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Which one of the following statements is wrong?

1. Algae increase the level of dissolved oxygen in the immediate environment
2. Algin is obtained from red algae and carrageenan from brown algae
3. Agar-agar is obtained from Gelidium and Gracilaria
4. Laminaria and Sargassum are used as food

Subtopic:  Algae |
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NEET - 2016
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Which of the following statement is correct?

1. Ovules are not enclosed by the 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.

Subtopic:  Gymnosperms: I | Gymnosperms |
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Which one is wrongly matched?
1. Uniflagellate gametes - Polysiphonia
2. Biflagellate zoospores - Brown algae
3. Gemma cups - Marchantia
4. Unicellular organism - Chlorella
Subtopic:  Rhodophyceae: Red Algae and Importance of Algae |
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Zygotic meiosis is characteristic of?

1. Fucus

2. Funaria

3. Chlamydomonas

4. Marchantia

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Life cycles of Ectocarpus and Fucus respectively are:

1. Diplontic, Haplodiplontic

2. Haplodiplontic, Diplontic

3. Haplodiplontic, Haplontic

4. Haplontic, Diplontic

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Select the mismatch

1. Cycas - Dioecious

2. Salvinia - Heterosporous

3. Equisetum - Homosporous

4. Pinus - Dioecious

Subtopic:  Gymnosperms: I | Gymnosperms |
 72%
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NEET - 2017
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