Question

Plants tend to grow quicker in night than in day is:
a. Seasonal variation
b. Biennial variation
c. Diurnal variation
d. Annual variation

Answer 1

In the evening, most of the plants grow faster rather than at night. Plants can use the products of the day's photosynthesis at night to aid in the uptake up water into their cells, which increases the turgor pressure of the cells and drives their enlargement. Sometimes this term is used in a way related to variations produced by many kinds of external stimuli.

Complete answer:

Seasonal variation has a considerable effect on plant establishment and growth. During photosynthesis, the plants grasp all the sunlight, carbon dioxide, and water possible. With those ingredients that plant make sugars, starch, and other vital compounds. Due to seasonal variation, the plant saves cell division and elongation for the night shift and grows quickly.
A part of the movement which is allocated to the effect of the seasons on the year, it is called a seasonal variation in rainfall. Plants can sense variation in the season.

The biennial variation resulted from the year-to-year variation in the number of adult shoots carrying new leaves.

Diurnal temperature variation is the variation that occurs from a high temperature to a low temperature during the same day.

Annual variations are commonly observed and primarily depend on climatic pulses.

Hence, the correct answer is option (A).

Note: We observe that plants grow fast in the dark, and do so because they operate on circadian cycles. Researches revealed that plants exhibit growth in predawn hours, and cease growth in daylight. In simplistic terms, it makes sense that plants would grow at night since daylight activity consists of absorbing light for photosynthesis.