Tag: seeds - structure and germination

Questions Related to seeds - structure and germination

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

Show answer
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.

Show answer
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

Show answer
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’.

Germination is hypogeal in

biology seeds - structure and germination germination seed germination the flower

  1. Cotton

  2. Pea

  3. Castor

  4. Bean

Show answer
Correct Option: B
Explanation:

Epigeal germination: In this type of germination, the hypocotyl elongates rapidly and arches upwards pulling the cotyledons which move above the soil. Bean, cotton, papaya, gourd, castor and onion have germination of this kind.

Hypogeal germination: In this type of germination, the epicotyl elongates and the cotyledons remain below the soil. Pea, mango, maize, rice, gram and groundnut have germination of this kind. So, the correct answer is 'Pea'.

Vivipary is characteristic of

biology seeds - structure and germination germination seed germination the flower

  1. Mesophytes

  2. Xerophytes

  3. Hygrophytes

  4. Halophytes

Show answer
Correct Option: D
Explanation:
Vivipary plants grow in high saline area.
A. Mesophytes- A plant need a moderate amount of water.
B. Xerophytes- A plant need a little liquid water(In dessert or in ice).
C. Hygrophytes- A plant grow in wet conditions.
D. Halophytes- A plant of high salt tolerent grows in water of high salinity.
So, the correct answer is 'Halophytes'.

Germination is epigeal in

biology seeds - structure and germination germination seed germination the flower

  1. Zea mays

  2. Helianthus

  3. Mangifera

  4. Pisum

Show answer
Correct Option: B
Explanation:

Epigeal germination: In this type of germination, the hypocotyl elongates rapidly and arches upwards pulling the cotyledons which move above the soil. Bean, cotton, papaya, gourd, castor and onion have germination of this kind.

Hypogeal germination: In this type of germination, the epicotyl elongates and the cotyledons remain below the soil. Pea, mango, maize, rice, gram and groundnut have germination of this kind.

A. Zea mays (Maize) - hypogeal germination.

B. Helianthus (Sunflower) - epigeal germination.

C. Mangifera (Mango)- hypogeal germination.

D. Pisum (Pea)- hypogeal germination.

So, the correct answer is 'Helianthus'.

An albuminous seed showing hypogeal germination is

biology seeds - structure and germination germination seed germination the flower

  1. Castor

  2. Bean

  3. Gram

  4. Maize

Show answer
Correct Option: D
Explanation:

Epigeal germination: In this type of germination, the hypocotyl elongates rapidly and arches upwards pulling the cotyledons which move above the soil. Bean, cotton, papaya, gourd, castor and onion have germination of this kind.

Hypogeal germination: In this type of germination, the epicotyl elongates and the cotyledons remain below the soil. Pea, mango, maize, rice, gram and groundnut have germination of this kind.

A. Castor- Albuminous seed shows epigeal germination.
B. Bean- Exalbuminous seed shows epigeal germination.
C. Gram- Exalbuminous seed shows hypogeal germination.
D. Maize- Albuminous seed shows hypogeal germination.
So, the correct answer is 'Maize'.

Epigeal germination occurs in

biology seeds - structure and germination germination seed germination the flower

  1. Pea

  2. Gram

  3. Castor

  4. Maize

Show answer
Correct Option: C
Explanation:

Epigeal germination: In this type of germination, the hypocotyl elongates rapidly and arches upwards pulling the cotyledons which move above the soil. Bean, cotton, papaya, gourd, castor and onion have germination of this kind.

Hypogeal Germination: In this type of germination, the epicotyl elongates and the cotyledons remain below the soil. Pea, mango, maize, rice, gram and groundnut have germination of this kind. So, the correct answer is 'Castor'.

In some halophytes, seeds germinate within fruits while attached to parent plant. The phenomenon is

biology seeds - structure and germination germination seed germination the flower

  1. Vivipary

  2. Monocrapic

  3. Vernalisation

  4. Seismonasty

  5. Both A and B

Show answer
Correct Option: A
Explanation:

A. Vivipary :  In plants, vivipary (precocious or premature germination) involves the germination of seeds while still on the parent plant. It is a widespread phenomenon in plants characterized by the lack of seed dormancy. 

C. Monocarpic- flowering only once.

D. Vernalisation- The cooling of seed during germination in order to accelerate flowering when it is planted.

E. Seismonasty is the nastic response of a plant or fungus to touch or vibration.

So, the correct answer is 'Vivipary'.