Monoecious plant of Chara shows the occurrence of:

1. Upper oogonium and lower antheridium on the same plant
2. Antheridiophore and archegoniophore on the same plant
3. Stamen and carpel on the same plant
4. Upper antheridium and lower oogonium on the same plant

Subtopic:  Sexual Reproduction | Events during Sexual reproduction |
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Meiosis occurs in
1. Megaspore
2. Meiocyte
3. Conidia
4. Gemmule

Subtopic:  Sexual Reproduction |
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Which one of the following is wrong about Chara?

1.  Globule and nucule present on the same plant
2.   Upper antheridium and lower oogonium
3.  Globule is a male reproductive structure
4.  Upper oogonium and lower round antheridium
Subtopic:  Events during Sexual reproduction |
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Which one of the following shows isogamy with nonflagellated gametes?
1. Ectocarpus
2. Ulothrix
3. Spirogyra
4. Sargassum

Subtopic:  Algae |
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Which one of the following generates new genetic combinations leading to variation?
1. Nucellar polyembryony
2. Vegetative reproduction
3. Parthenogenesis
4. Sexual reproduction

Subtopic:  Sexual Reproduction |
 94%
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In which set of organisms does external fertilization occur
1. Echinodermata and mosses
2. Hemichordata and ferns
3. Amphibians and algae
4. Reptiles and gymnosperms

Subtopic:  Sexual Reproduction |
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Grafting is not successful in monocots but is successful in dicots because they have:
1. Vascular bundles arranged in a ring
2. Cambium for secondary growth
3. Vessels with elements arranged end to end
4. Cork cambium

Subtopic:  Sexual Reproduction |
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A scion is grafted on a stock. The quality of fruits produced will depend upon the genotype of:
1. Scion
2. Stock
3. Both 1. and 2.
4. None of the above

Subtopic:  Artificial |
 57%

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Gemmule formation is a common mode of asexual reproduction in
1. Paramecium
2. Hydra
3. Sponges
4. Yeast

Subtopic:  Asexual Reproduction |
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A prominent Indian botanist noted chiefly for his invention of the technique of test-tube fertilization of angiosperms is:

1. Panchanan Maheshwari 2. M. S. Swaminathan
3. Gurdev Khush 4. Y. Subbarow
Subtopic:  Introduction |
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