Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology seeds - structure and germination germination seed germination the flower

Mangrove plants show vivipary. This is

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

Multiple choice biology seeds - structure and germination germination seed germination the flower

Vivipary occurs in

  1. Mangrove plants

  2. <p>Alpine plants / Orchiods</p>

  3. Tropical plants / Sea Weeds

  4. <p>Desert plants / Vallisneria</p>
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Vivipary is

  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.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vivipary is the phenomenon where the seed germinates while still attached to the parent plant, which is a common adaptation in mangrove species.

Multiple choice biology seeds - structure and germination germination seed germination the flower

The character found only in halophytes is

  1. Vivipary

  2. Vekamen

  3. Heterophylly

  4. Sunken stomata
Reveal answer Fill a bubble to check yourself
A Correct answer
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’.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Germination is hypogeal in

  1. Cotton

  2. Pea

  3. Castor

  4. Bean
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Vivipary is characteristic of

  1. Mesophytes

  2. Xerophytes

  3. Hygrophytes

  4. Halophytes
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology seeds - structure and germination germination seed germination the flower

Germination is epigeal in

  1. <p>Zea mays</p>

  2. <p>Helianthus</p>

  3. <p>Mangifera</p>

  4. <p>Pisum</p>
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.