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#critical photoperiod

3 public questions tagged with this topic.

PHOTOPERIODISM+PYQS

Plants that require day length shorter than critical photoperiod for flowering are:

Correct option is B, Short day plants. In PHOTOPERIODISM problems like this, the accurate statement is Short day plants; the others are common mix-ups. Not these: A) Long day plants; C) Day neutral plants; D) Annual plants. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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PHOTOPERIODISM+PYQS

Plants that flower when day length is greater than critical photoperiod are called:

C fits best: Long day plants. Keep the PHOTOPERIODISM basics straight and Long day plants stands out as the precise answer. Avoid: A) Short day plants; B) Day neutral plants; D) Intermediate plants. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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PHOTOPERIODISM+PYQS

Critical photoperiod refers to:

Answer: B) Definite day length beyond or below which flowering does not occur. For PHOTOPERIODISM, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Minimum light required for photosynthesis; C) Total duration of sunlight in a year; D) Length of vegetative phase. Name the process first, then pick the option that describes it — don’t reverse cause and effect.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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