Question

The day-neutral plant is
a) Tobacco
b) Tomato
c) Wheat
d) Oat

Answer 1

Photoperiodism in the plant is the reaction of the plant that occurs in response to the light and darkness received by it during its lifetime. The plants can be divided into long-day plants, short-day plants, and day-neutral plants depending upon the period of light availability. The amount of sunlight received by them varies from each other.

Complete answer:
Day-neutral plants are those plants that don’t depend on the presence or absence of light for their flowering. They are independent and do not depend on their photoperiod. They initiate their flowering time only when they have suitable climatic conditions favorable. Some of the day-neutral plants are tomato, cucumbers, corn, etc.
Short-day plants are those which are in requirement of longer darker periods and very short light periods. The darkness makes them flower. If their dark period is interrupted or gets shortened due to some reason then they don’t flower. The night darkness is not present in ample amounts for these plants. So, they need to be kept in a place where darkness can be maintained for a long stretch of the time period. Even the presence of a small amount of light can interrupt their flowering period. Example- Tobacco
Long day plants are those plants that need sunlight or a source of light for the maximum duration of the day. They need a much lesser amount of dark periods. They flower when the days get longer and nights to become shorter. Interruption in their photoperiod can stop their flowering. Example- wheat and oat.

So, the answer is ‘tomato’.

Note:
Photoperiodism plays an important role in the flowering of the plants. Interruption in their dark or the light period can lead to the non-flowering of the plants. So extra care is required by such plants so that they can flower properly on time. The day-neutral plants do not require such care as they can flower without being dependent on the photoperiod.