Tag: seed dormancy

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Questions Related to seed dormancy

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

Seed dormancy allows the plants to

  1. Overcome unfavourable climatic conditions

  2. Develop healthy seeds

  3. Reduce viability

  4. Prevent deterioration of seeds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Seed dormancy is an adaptive mechanism that prevents germination during unfavorable environmental conditions, ensuring the plant germinates only when conditions are suitable for survival.

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

A method of breaking dormancy and allowing ample absorption of water is

  1. Stratification

  2. Scarification

  3. Vernalisation

  4. Devernalisation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A. Stratification: Seeds are moistened and exposed to oxygen for variable period at low or high temperature.

B. Scarification: Hard, impermeable seed coat is weakened or ruptured by filing, chip­ping, abosrbing hot water.

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

D. Devernalisation- The heating of seed during germination in order to deaccelrating flowering when it is planted.
So, the correct answer is 'Scarification'.

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

Which one of the following does NOT exhibit seed dormancy?

  1. Rhizophoi

  2. Xanthium

  3. Phaseolus

  4. Cassia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rhizophora is a mangrove plant that exhibits vivipary, where seeds germinate while still attached to the parent plant, thus lacking seed dormancy.

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

Treatment of seed at low temperature under moist conditions to break its dormancy is called -

  1. Sclarification

  2. Vernalization

  3. Chelation

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

  • Stratification involves the treatment of seed at low temperature(5−10 C)
under sufficiently moist conditions to break its dormancy and to induce germination. 
  • Scarification involves any damage or breakage of seed coat by physical methods (eg, use of a scalpel, wooden hammer, etc) or chemical methods (use of mild acids) to break seed dormancy. 
  • Vernalization and Chelation is the chill treatment Df plant in its early stages of life history to stimulate or induce early flowering

So, the correct answer is 'Stratification'.

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

Which method makes the seed coat permeable and allows growth of embryo?

  1. Scarification

  2. Stratification

  3. Vernalisation

  4. Denudation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scarification in the method of weakening and opening the seed coat to initiate germination. It makes seed coat permeable. This method is employed for plant species which are impervious to water and gases.

Thus, the correct answer is 'Scarification'.

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

Verbalization is used to overcome chemical dormancy in seeds. The temperature range used for this purpose is?

  1. Zero to $4$ degrees C
  2. $15$ to $20$ degrees C
  3. $20$ to $30$ degrees C
  4. $30$ to $40$ degrees C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vernalization (often misspelled as verbalization) is the induction of a plant's flowering process by exposure to the prolonged cold of winter, typically in the range of 0 to 4 degrees Celsius.

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

Consider the following statements regarding allelopathy.
a. It is the phenomenon of seed dormancy due to the presence germination inhibitors on the surface of seed coat.
b. It is the phenomenon of the production of organic substances by one plant having handful effect on the other.
c. It helps proper spacing of the plants to reduce competition.
d. It helps the xerophytes to grow in small groups to reduce the transpiration.
Of these statements.

  1. $1, 2$ and $3$ are correct
  2. $1$ and $3$ are correct
  3. $2$ and $3$ are correct
  4. $1$ and $4$ are correct
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Allelopathy involves the production of chemicals by plants that influence the growth of other plants. Statements 1, 2, and 3 correctly describe aspects of this phenomenon, including germination inhibition and spacing.