Srijan ICSE Biology Class 7 Solutions. We covered all the Srijan ICSE Biology Class 7 Solutions MCQs in this post for free so that you can practice well for the exam.
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Srijan ICSE Biology Class 7 Objective with Solutions for Students
To study meiosis in plants, the best part would be:
(a) Shoot apex
(b) Root apex
(c) Anthers
(d) Leaf cells
Option c – Anthers
A plant hormone used for inducing morphogenesis in plant tissue culture is:
(a) Ethylene
(b) Gibberellin
(c) Cytokinin
(d) Abscisic acid
Option c – Cytokinin
Cell elongation in internodal regions of green plants takes place due to:
(a) Indole acetic acid
(b) Cytokinins
(c) Gibberellins
(d) Ethylene
Option c – Gibberellins
Plasticity in plant growth means that:
(a) Plant roots are extensible.
(b) Plant development is dependent on the environment.
(c) Stems can extend.
(d) None of the above
Option b – Plant development is dependent on the environment
The effect of photoperiod on the growth and development of plants, especially on flowering, is called:
(a) Vernalisation
(b) Photoperiodism
(c) Phototaxis
(d) Both (a) and (b)
Option b – Photoperiodism
The photoperiod in plants is perceived as:
(a) Meristem
(b) Flower
(c) Floral buds
(d) Leaves
Option d – Leaves
Which of the following is an example of a long-day plant?
(a) Tomato
(b) Maize
(c) Rice
(d) Radish
Option d – Radish
The flowering of plants by exposure to low temperatures is called:
(a) Vernalisation
(b) Cryobiology
(c) Photoperiodism
(d) Micrografting
Option a – Vernalisation
The temperature required for vernalization is:
(a) 5-10°C
(b) 5-15°C
(c) 0-5°C
(d) 3-17°C
Option c – 0-5°C
Examples of plants that require vernalization are:
(a) Pea
(b) Sugar beet
(c) Cabbage
(d) All of these
Option d – All of these
Vernalisation can be reversed by:
(a) Application of high temperature.
(b) Application of auxin.
(c) Application of more or less temperature.
(d) Application of gibberellin.
Option a – Application of high temperature
Which one among the following produces seeds but not flowers?
(a) Cashewnut
(b) Coffee
(c) Groundnut
(d) Pine
Option d – Pine
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