12th Grade > Biology
GROWTH & REPRODUCTION IN PLANTS AND ANIMALS MCQs
Plant Growth And Development, Reproduction In Animals, Sexual Reproduction In Flowering Plants
Total Questions : 111
| Page 2 of 12 pages
Answer: Option A. -> Wheat and rye
:
A
Vernalisation refers specially to the promotion of flowering by a period of low temperature. It is useful in conversion of winter variety into spring variety by chilling treatment (0.4∘C). Applicable only to temperate plants.
:
A
Vernalisation refers specially to the promotion of flowering by a period of low temperature. It is useful in conversion of winter variety into spring variety by chilling treatment (0.4∘C). Applicable only to temperate plants.
Answer: Option C. -> Scarification
:
C
Scarificationinvolves weakening, opening, or otherwise altering the coat of a seed to encourage germination.Scarification is often done mechanically, thermally, and chemically. The seeds of many plant species are often impervious to water and gases, thus preventing or delaying germination.
:
C
Scarificationinvolves weakening, opening, or otherwise altering the coat of a seed to encourage germination.Scarification is often done mechanically, thermally, and chemically. The seeds of many plant species are often impervious to water and gases, thus preventing or delaying germination.
Answer: Option B. -> Suppression of growth of axillary buds by the presence of apical buds
:
B
In most higher plants, the growing apical bud inhibits the growth of the lateral (axillary) buds, a phenomenon called apical dominance.
:
B
In most higher plants, the growing apical bud inhibits the growth of the lateral (axillary) buds, a phenomenon called apical dominance.
Answer: Option D. -> Both A and B
:
D
Sleep movement is known as nastic response, this occurs daily in the response to some stimulus either day, night, temperature, pH, turgor pressure, etc.
:
D
Sleep movement is known as nastic response, this occurs daily in the response to some stimulus either day, night, temperature, pH, turgor pressure, etc.
Answer: Option C. -> Apical meristem
:
C
Primary growth in plants is due to apical meristems (root and shoot apical meristems)
:
C
Primary growth in plants is due to apical meristems (root and shoot apical meristems)
Answer: Option D. -> Meiosis
:
D
Meiosis occurs during the reproductive phase and not during the development of the grain. Mitosisin the cells of such root and shoot apical meristems leads to increase in the number of cells.The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation.The plant cells grow in size by cell enlargement which in turn requires water. Turgidity of cells helps in extension growth.
:
D
Meiosis occurs during the reproductive phase and not during the development of the grain. Mitosisin the cells of such root and shoot apical meristems leads to increase in the number of cells.The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation.The plant cells grow in size by cell enlargement which in turn requires water. Turgidity of cells helps in extension growth.
Answer: Option C. -> is of the open form
:
C
In plants, new cells are always being added by the activity of meristems to the body. This is called open form of growth.
:
C
In plants, new cells are always being added by the activity of meristems to the body. This is called open form of growth.
Answer: Option C. -> Carrot, Cabbage, Beet
:
C
Monocarpic biennials, flower and die in the second season. They get vernalized in winter season during first year. Carrot, cabbage and beet are monocarpic biennials
:
C
Monocarpic biennials, flower and die in the second season. They get vernalized in winter season during first year. Carrot, cabbage and beet are monocarpic biennials
Answer: Option A. -> True
:
A
All structures in a plant, develop from a single cell, zygote, through cell division and differentiation.
:
A
All structures in a plant, develop from a single cell, zygote, through cell division and differentiation.
Answer: Option A. -> Tobacco
:
A
The phenomenon of photoperiodism was first discovered by Garner and Allard in tobacco plant. They observed that Maryl and Mammoth variety of tobacco could be made to flower by reducing the light hours with artificial darkening. It could be made to remain vegetative in winter by providing extra light.
:
A
The phenomenon of photoperiodism was first discovered by Garner and Allard in tobacco plant. They observed that Maryl and Mammoth variety of tobacco could be made to flower by reducing the light hours with artificial darkening. It could be made to remain vegetative in winter by providing extra light.
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