Question

Flowering dependent on cold temperature is
A. Cryotherapy
B. Cryogenics
C. Cryoscopy
D. Vernalisation

Answer 1

Plants react to their environment in different ways depending on the time of day and temperature. For flowering, different plants require varied amounts of daylight. Flowering in some plants is also influenced by temperature fluctuations.

Complete answer:
Option A: The use of severe cold to freeze and eliminate aberrant tissue is known as cryotherapy. Many skin disorders (such as warts and skin tags) and some malignancies, including prostate, cervical, and liver cancer, are treated with it. Cryoablation is another name for this procedure.
So option A is not correct.
Option B: Cryogenics is the branch of science concerned with the creation and effects of extremely cold temperatures. The name comes from the Greek words kryos, which means "frost," and genic, which means "to produce".
So option B is not correct.
Option C: Cryoscopy is the procedure of estimating the molecular weights of solutes by determining the lower freezing points caused in liquid by dissolved compounds.
So option C is not correct.
Option D: Vernalization is the process of forcing a plant to flower by exposing it to cold for an extended period of time. Lysenko originated the phrase in 1928. He claims that by giving immature plants or moistened seeds a cold treatment, they can be coaxed to blossom.

So option D is the correct answer.

Note:
Similarities between vernalisation and photoperiodism-
The accelerated or scheduled unfolding of certain plant and animal species characterises both processes. Both of these mechanisms have an effect on or influence the flowering process in plants. Some physiological processes in animals are influenced by photoperiodism. Due to the practicality of the processes, they can be artificially induced to achieve the desired result; for example, strawberry plants can be artificially vernalised to grow during non-productive seasons. Similarly, when Suffolk cross with sheep and young male red deer were placed on an artificial photoperiod that mimicked two cycles of daylength in one calendar year, they demonstrated two cycles of intake, gonadal acti, and reproductive activity.