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Photoperiodism is
Photoperiodism refers to the physiological reaction of organisms to the length of day or night. It is most commonly associated with the timing of flowering in plants, where the length of daylight affects the plant's ability to flower. Hence, the correct answer is 'Effect of length of day on flowering.'
Which factor increases in plant in absence of light ?
In the absence of light, plants often exhibit a phenomenon known as etiolation. During etiolation, plants typically have elongated stems and longer internodes as they search for light. This results in the length of internodes increasing, which contributes to the growth of the plant along its longitudinal axis.
If cells obtain ability of cell division in certain circumstances, it is called .........
De-differentiation is the process by which cells that have specialized (differentiated) regain the ability to divide. This can occur under certain circumstances, such as when plants need to heal wounds or regenerate tissues.
Which activity in plant is observed due to ethylene ?
Ethylene is a plant hormone that plays a crucial role in the ripening and maturation of fruits. It triggers a series of physiological changes that lead to the softening, sweetening, and color change of fruits.
Match the following : Column I
(P) Opening of leaf blade
(Q) Closing of leaves
(R) Zigzag movement in apical bud
(S) Spiraland helical growth of tendrilar plants
(T) Pulsation in leaflets of indian telegraph plant
Column II
(i) Epinasty
(ii) Hyponasty
(iii) Nutation
(iv) Circumnutation
(v) Variation
Match the list : Column I (P) Phototropism (Q) Geotropism (R) Hydrotropism (S) Thigmotropism Column II (i) Water (ii) Gravitation (iii) Light (iv) Touch
The correct matching is as follows: (P) Phototropism - Light, (Q) Geotropism - Gravitation, (R) Hydrotropism - Water, (S) Thigmotropism - Touch. This is because:
Phototropism is the growth of a plant in response to light, Geotropism is the growth in response to gravity, Hydrotropism is the growth in response to water, and Thigmotropism is the growth in response to touch.
Which type of dormancy is found when seed is impermeable to water or gaseous exchange ?
Which type of dormancy, inhibits embryo growth and germination in seed ?
Physiological dormancy is a type of endogenous dormancy where internal factors within the seed, such as hormonal balances, prevent the embryo from growing and germinating even when external conditions are favorable.
What is the type of dormancy in which embryo do not differentiate into various tissue at the time of fruit maturation?
During physiological and physical condition some changes observed in seed, is knows as ......
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.