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Q. No.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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. Uniflagellate gametes - Polysiphonia
2. Biflagellate zoospores - Brown algae
3. Gemma cups - Marchantia
4. Unicellular organism - Chlorella
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn example of colonial alga is
(1) Chlorella
(2) Volvox
(3) Ulothrix
(4) Spirogyra
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDouble fertilisation is exhibited by
(1) gymnosperms
(2) algae
(3) fungi
(4) angiosperms
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyZygotic meiosis is characteristic of?
1. Fucus
2. Funaria
3. Chlamydomonas
4. Marchantia
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLife cycles of Ectocarpus and Fucus respectively are:
1. Diplontic, Haplodiplontic
2. Haplodiplontic, Diplontic
3. Haplodiplontic, Haplontic
4. Haplontic, Diplontic
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the mismatch
1. Cycas - Dioecious
2. Salvinia - Heterosporous
3. Equisetum - Homosporous
4. Pinus - Dioecious
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConifers are adapted to tolerate extreme environmental conditions because of
(1) broad hardy leaves
(2) superficial stomata
(3) thick cuticle
(4) the presence of vessels
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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 |
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