Tag: germination

Questions Related to germination

Oldest known crop of the world is of

biology seeds - structure and germination germination seed germination the flower

  1. Wheat

  2. Rice

  3. Barley

  4. Both (A) and (C)

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Correct Option: D
Explanation:

The first domesticated crops include eight plant species with three cereals, four pulses and flax. These are namely Triticum dicoccum, T. monococcum, Hordeum vulgare, lentils, pea, chick pea and bitter vetch. Thus, out of the given options, barley and wheat the one of the oldest cultivated crop of world. 
Thus, the correct answer is option D.

At the time of germination, cotyledon and endosperm do not come out of the soil. This type of germination is called as

biology seeds - structure and germination germination seed germination the flower

  1. Hypogeal germination

  2. Epigeal Germination

  3. Monoecious germination

  4. None of the above

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Correct Option: A
Explanation:

The germination process which takes place below the ground and the cotyledon and endosperm do not come out of the soil is called as Hypogeal germination.

So the correct option is 'Hypogeal germination.'

Germination in which cotyledons come above the surface of soil is known as 

biology seeds - structure and germination germination seed germination the flower

  1. Epigeal

  2. Hypogeal

  3. Parthenocarpic

  4. Dioceous

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Correct Option: A
Explanation:

In many dicotyledons like beans, castor, and some monocotyledons, the cotyledon is pushed above the soil by rapid elongation of the hypocotyl and they function as photosynthetic organs till the establishment of the seedling. This kind of germination is known as epigeal germination. 

Mangrove plants show vivipary. This is

biology seeds - structure and germination germination seed germination the flower

  1. Germination of seeds with in fruits while still attached to parent plant

  2. Germination of seeds in fruits on the soil

  3. Germination of seeds within fruit on sterile artificial culture medium

  4. Germination of seeds only after dispersal of fruits

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Correct Option: A
Explanation:

The mangroves grow as a group of shrubs along the tidal coasts of mudflats, with specially evolved viviparous (bringing forth live young)  seed development just like mammals. In mangroves, Abscisic acid(ABA) a plant hormone plays a significant role in viviparous germination of seeds. 

The plant hormone leads to transduction followed by the MAPK signaling pathway. 
Vivipary is a condition whereby the embryo(the young plant within the seed) grows first to break through the seed coat out of the fruit while still attached to the parent plant.

 So, the correct answer is 'Germination of seeds within fruits while still attached to the parent plant'

Hair present on the cob of corn are

biology seeds - structure and germination germination seed germination the flower

  1. Seed hairs

  2. Modified hairs of bracts

  3. Styles

  4. Stigmas and styles

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Correct Option: D
Explanation:

Stigma feathery or papillote. Silken threads of Maize are very long stigmas but some authors regard them as long styles bearing equally long stigmas inthe apical region.

Vivipary is a characteristic feature of.

biology seeds - structure and germination germination seed germination the flower

  1. Mesophytes

  2. Halophytes

  3. Xerophytes

  4. Hydrophytes

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Correct Option: A

Vivipary occurs in

biology seeds - structure and germination germination seed germination the flower

  1. Mangrove plants

  2. Alpine plants / Orchiods

  3. Tropical plants / Sea Weeds

  4. Desert plants / Vallisneria

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Correct Option: A
Explanation:

Vivipary is the condition whereby the embryo (the young plant within the seed) grows first to break through the seed coat then out of the fruit wall while still attached to the parent plant. This condition is found in Bruguiera, Ceriops, Kandelia and Rhizophora species (Mangrove plants). So, the correct answer is 'Mangrove plant'.

Germination of seed within fruit is

biology seeds - structure and germination germination seed germination the flower

  1. Ovipary

  2. Vivipary

  3. Hypogeal

  4. Epigeal

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Correct Option: B

Vivipary is

biology seeds - structure and germination germination seed germination the flower

  1. Seed germination with subterranean cotyledons.

  2. Seed germination with epiterranenan cotyledons.

  3. Fruit development without pollination.

  4. Seed germination inside the fruit while attached to the plant.

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Correct Option: D

The character found only in halophytes is

biology seeds - structure and germination germination seed germination the flower

  1. Vivipary

  2. Vekamen

  3. Heterophylly

  4. Sunken stomata

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Correct Option: A
Explanation:

Vivipary is the special type of seed germination. During germination, seed is till attached to parent plant and nourished by it. It generally occurs in mangrove plant. The mangrove plants are generally medium sized tree which grow in salty marshes of sea coasts. (eg. Rhizophora, Sonneratia, Avicennia). The seeds of mangrove plants cannot germinate on the marshy habitat because of the excessive salt concentration and lack of oxygen. So, the correct answer is ‘Vivipary’.