Tag: plant growth and development

Quizzes (13) Questions (188)

Questions Related to plant growth and development

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

Which of the following statements regarding photoperiodism is false?

  1. The response of plants to periods of light/day is termed as photoperiodism

  2. The shoot apices cannot perceive photoperiods

  3. In day neutral plants there is no correlation between exposure to light duration and induction of flowering response

  4. Shoot apices modify themselves into flowering apices prior to flowering

  5. The site of perception of light/dark duration is the flower
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation
Photoperiodism is the response of plants to photoperiods, that is the length of day and night. During photoperiodism, shoot apices modify themselves into flowering apices prior to flowering. However, they do not perceive photoperiods. Rather, the site of perception of light and dark duration are leaves. In day-neutral plants, induction of flowering response does not depend on exposure to light duration. The site of perception of light/dark duration is the leaves.
So, the correct answer is 'The site of perception of light/dark duration is the flower'.
Multiple choice vernalisation plant growth growth and development plant growth and development biology

Which is incorrect statement?

  1. There are no mesodermal cells in pseudocoelomates

  2. There is no body cavity in first triploblastic animals

  3. There is no second opening in diploblastic animal gut

  4. There is no co-ordination between cells of sponges
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Animals have a pseudocoelom that means  “false cavity”, which is a fluid-filled body cavity. Tissue derived from mesoderm partly lines the fluid-filled body cavity of these animals. It is mainly found in Nematoda.

So the correct option is 'There are no mesodermal cells in pseudocoelomates'

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

Seeds of winter varieties are benefitted by technique

  1. Senescence

  2. Photoperiodism

  3. Vernalisation

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

Vernalisation is the phenomena in which flowering is induced in the plant by exposing it to low temperatures. Seeds of winter varieties will flower only when they are exposed to cold period early in their development. Artificially, flowering can be induced in spring as well if they are exposed to artificial vernalization. 

Thus, the correct answer is option C.

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

Vernalisation is seen in

  1. Sugarbeet

  2. Carrot

  3. Cabbage

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

Vernalization is the process by which plant can be induced to flower by exposing it to prolonged cold or winter. The term was coined by Lysenko in 1928. He stated that certain plants can be made to flower by providing low-temperature treatment to young plants or moistened seeds. Sugarbeet, carrot are biennial plants that require vernalization for flowering.

Thus, the correct answer is option D.

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

The stimulus of cold treatment (vernalisation) is perceived by

  1. Leaves

  2. Flowers

  3. Roots

  4. Shoot apices
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Vernalisation is the conversion of winter variety into spring variety by chilling treatment or low temperature. Treatment with low temperature (0-4°C) leads to shortening of vegetative phase and initiation of reproductive phase. The stimulus of cold treatment is perceived by shoot tips, embryo tips and other meristematic regions pf the plant.
So, the correct answer is 'Shoot apices'.
Multiple choice vernalisation plant growth growth and development plant growth and development biology

Apple requires a low temperature for flowering and fruiting

  1. 10$^o$ C
  2. 7$^o$ C
  3. Below 7$^o$ C
  4. 10$^o$ - 15$^o$ C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Apple grows in low temperature for germination it needs more time as earlier stages are less tolerant to low temperature but flowering starts at the temperature which is around 7 degree or below it that means it needs extreme cold climate to grow.

So the correct option is 'Below $7^o$ C'.

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

The term 'Yarovization' was coined by

  1. Lysenko

  2. Klebs

  3. Yabuta

  4. Kogl and Haagen-Smit
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yarovization is the process by which plant can be induced to flower by exposing it to the prolonged cold of winter. After this, plants show flowering. The term was coined by Lysenko in 1928.  He stated that certain plants can be made to flower by providing low temperature treatment to young plants or moistened seeds. Other terms like vernalization, jarovization, springification were also coined for the same phenomenon. However, today the most accepted term is vernalization.

Thus, the correct answer is A 'Lysenko'

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

Potato is _________ for flower formation but _________ for tuberisation.

  1. LDP, SDP

  2. SDP, LDP

  3. LDP, day neutral

  4. SDP, day neutral
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the case of potato, it requires more photoperiod to induce flowering. Whereas for the formation of tuber, it requires very less photoperiod. Thus, it is told that potato is LDP for inducing flowering; but SDP for tuber formation. The flower-inducing florigen and tuber-inducing tuberigen signals are functionally exchangeable. Flowering and tuberization are distinct reproduction strategies, both of which involve the sensing of the photoperiod and generation of a signal in the leaves (process called as induction), the subsequent transport of the signal (known as florigen or tuberigen), and the response in a distant organ, the vegetative meristem, or stolon tips (also called evocation).

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

Cabbage is a biennial plant which produces flowers in the second year of growth. In an attempt to make it flower in a single year, four potted plants (I, II, III, and IV) of cabbage were subjected to different temperatures for several days given in the table.

Potted plant Temperature
I $5^o C$
II $20^o C$
III $30^o C$
IV $25^o C$

Which potted plant will show flowering?

  1. I

  2. II

  3. III

  4. IV
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The low temperature required for vernalization is usually $0^o-5^oC$. In nature, the plants requiring vernalization are commonly biennials (e.g., cabbage, sugar canes), which complete their life cycle in two years. They germinate and grow vegetatively in the first year and produce flowers in the second year of growth. These plants fulfill their cold requirement during winters. However, such-biennial plants can be made to flower in one growing season by providing low-temperature treatment (i.e., $0^o-5^oC$ temperature) to young plants or moistened seeds.
So the correct answer is 'I'.
Multiple choice vernalisation plant growth growth and development plant growth and development biology

Biennials get changed into annuals by

  1. Hormones

  2. Photoperiodism

  3. Grafting

  4. Vernalisation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Vernalization is the process by which plant can be induced to flower by exposing it to the prolonged cold or winter. The term was coined by Lysenko in 1928. He stated that certain plants can be made to flower by providing low temperature treatment to young plants or moistened seeds. Biennial plants are changed into annual plants by the process of vernalisation and induces flowering.
Thus, the correct answer is option D.