Question

Identify the conditions under which long-day plants will flower.

• A. The length of daylight exposure exceeds the critical photoperiod (critical night length).
• B. The length of daylight is less than the critical length of darkness.
• C. Abundant water and warmth are present to induce germination.
• D. The axial buds start to grow and bend toward light due to auxin elongating cells on the dark side of the stem.

Answer 1

The correct option is A The length of daylight exposure exceeds the critical photoperiod (critical night length).

photoperiodism is in which some plants need a certain amount of light to flower. This is due to seasonal changes in the length of day and night.

So the correct option is 'The length of daylight exposure exceeds the critical photoperiod (critical night length).'