Tag: vernalisation

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Questions Related to vernalisation

Multiple choice vernalisation plant growth growth and development plant growth and development biology

Vernalization can remove Kernel wrinkles in:

  1. Wheat

  2. Petkus rye

  3. Maize

  4. Rice
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Vernalisation is defined as the qualitative or quantitative dependence of plants on exposure to a low temperature to flower. Temperature affects flowering, metabolic activities, and germination of seeds in plants. Plants that grow in mild weather germinate at low temperatures whereas those that grow in hot regions germinate at high temperatures. 
  • Some plants need exposure to a low temperature to germinate. Furthermore, a plant can be induced to flower in a growing season by exposing it to low temperature. Therefore, it shortens the vegetative phase and hastens flowering in plants. 

So, the correct answer is A.
Multiple choice vernalisation plant growth growth and development plant growth and development biology

Vernalization is subjected to plants growing in 

  1. Tropical areas

  2. Sub tropical

  3. Temperate areas

  4. Hot areas/Arctic region
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Vernalization refers to the phenomenon of inducing flowering in plants by subjecting them to prolonged cold temperatures. After vernalization, plants acquire the ability to flower. Vernalization is subjected to plants growing in Temperate(temperature in these regions is moderate) areas.
So, the correct answer is 'Temperate areas'.
Multiple choice vernalisation plant growth growth and development plant growth and development biology

Which of the following is not true regarding vernalisation

  1. Its a temperature dependent phenomenon

  2. Its a light dependent phenomenon

  3. It prevents precocious reproductive development

  4. Its an aerobic process
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The process of induction of flowering in plants, by exposing seeds at low temperature for prolonged periods is called Vernalisation. It is an aerobic, temperature dependent phenomena, prevents precocious reproductive development. It does not depend on light.

So, the correct answer to the question is ‘vernalisation is not a light dependent phenomena’.

Multiple choice vernalisation plant growth growth and development plant growth and development biology

Vernalization is a phenomenon which concerns 

  1. Low temperature requirement for flowering in plants

  2. Migration of birds from their winter homes to summer habitats

  3. Immunization of infants against the common infectious diseases

  4. Entering of cold blooded animals into an inactive state in winter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vernalization is the acquisition of a plant's ability to flower in the spring by exposure to the prolonged cold of winter, or by an artificial equivalent. Many plants grown in temperate climates require vernalization and must experience a period of low winter temperature to initiate or accelerate the flowering process. This ensures that reproductive development and seed production occurs in spring and summer, rather than in autumn.

Multiple choice vernalisation plant growth growth and development plant growth and development biology

Chemical agent that has important role in flowering is

  1. Fluorocarbon
  2. GA${ _3}$

  3. Florigen

  4. Auxins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
a) Fluorocarbon is a compound containing only carbon and fluorine. These compounds can be used as refrigerants, solvents, and anesthetics.
b) Gibberellic Acid or GA$ _3$ is a plant hormone which regulates various developmental processes, including stem elongation, germination, dormancy, flowering, flower development and leaf and fruit senescence.
c) Florigen also called flowering hormone is the hypothesized hormone-like molecule responsible for flowering in plants.
d) Auxins are a class of plant hormones responsible for stem elongation and maintaining apical dominance.
So the correct answer is C.
Multiple choice vernalisation plant growth growth and development plant growth and development biology

What is vernalisation?

  1. Growth curve in response to light

  2. Recurrence of day and night

  3. Effect of day length on plant growth

  4. Acceleration of the ability to flower by low temperature treatment
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Vernalization is the process of induction of flower by prolonged exposure to cold temperature. It is an adaptation shown by plants which are exposed to harsh winter followed by relatively short growing seasons. Vernalization is practiced artificially too.

Multiple choice vernalisation plant growth growth and development plant growth and development biology

Vernalization treatment can convert

  1. A biennial into an annual

  2. A spring variety into a winter variety

  3. An annual into a perennial

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vernalization is the process of inducing flowering to a plant by exposing the plant to cold of winter or through artificial processes. The process of Vernalization converts a biennial into an annual and spring variety into a winter variety and an annual into a perennial.

So the correct option is 'All of these.'

Multiple choice vernalisation plant growth growth and development plant growth and development biology

Vernalization is

  1. Growth curve related to light

  2. Effect of photoperiods on plant growth

  3. Speeding up ability to flower by low temperature

  4. Diurnal photoperiodicty
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In many plants, the temperature has a profound effect on flowering. Some plants do not flower under the inductive photoperiod conditions but flower when a cold temperature treatment is given to them. This acquisition or acceleration of the ability to flower by a chilling treatment is said to be vernalization. It is the method of inducing early flowering in plants by pretreatments of their seeds at a very low temperature. Thus option C is the correct answer. 

Multiple choice vernalisation plant growth growth and development plant growth and development biology

The pathway leading to flowering for plants that requires vernalization is the

  1. Seasonal pathway

  2. Light dependent pathway

  3. Temperature dependent pathway

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vernalization is the induction of a plant's flowering process by exposure to the prolonged cold of winter. Therefore, it is classified as a temperature dependent pathway.

Multiple choice vernalisation plant growth growth and development plant growth and development biology

Which of the following can shorten the vegetative period of plants?

  1. Vernalization

  2. Apical meristem

  3. Germination

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vernalization promotes early flowering in plants that would otherwise require a longer vegetative period, effectively shortening the time spent in the vegetative phase.