If a tree flowers thrice in a year (Oct., Jan. and July) in Northern India, it is said to be :
Correct answer: A. Photo and Thermoinsensitive
- A. Photo and Thermoinsensitive
- B. Photo and Thermosensitive
- C. Photosensitive but Thermoinsensitive
- D. Thermosensitive but Photoinsensitive.
Explanation
a) : Flower formation is a transitional phase in the life eycle of plant. During flowering, vegetative shoot apex is converted into reproductive shoot apex. The physiological mechanism for flowering is controlled by 2 factors : photoperiod or light period, i.e., photoperiodism and low temperature, i.e., vernalization.
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About Growth and Development
Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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