This practice/Revision test includes 25 important multiple-choice questions (MCQ) from the chapter- Plant Growth And Development (Biology class 11th) for the viva, neet, and other competitive entrance exams.
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Q.1.
Mechanism of development was explained by
- Hans Dietrisch
- Spemann
- Both a and b
- Haemmerling
Answer:
(c) Both a and b
Explanation: Both a and b
Explanation: Both a and b
Q.2.
Intercalary meristems are of
- Permanent nature
- Temporary nature
- Some are permanent some temporary
- None of these
Answer:
(b) Temporary nature
Explanation: Intercalary meristems are of temporary nature
Explanation: Intercalary meristems are of temporary nature
Q.3.
Cells of fibers and tracheids elongate during
- Phase of cell division
- Phase of cell elongation
- Phase of cell maturation
- Phase of cell differentiation
Answer:
(a) Phase of cell division
Explanation: Phase of cell division
Explanation: Phase of cell division
Q.4.
Typical plant growth shows _________ curve.
- J-shaped
- S-shaped
- I-shaped
- Parabolic
Answer:
(b) S-shaped
Explanation: Typical plant growth represents sigmoid curve
Explanation: Typical plant growth represents sigmoid curve
Q.5.
Exponential growth of the plants is express as W1 = W0 ert r represents
- ability of the plant to produce new cells
- efficiency index
- relative growth rate
- all of the above
Answer:
(d) all of the above
Explanation: r is the relative growth rate and also measures the ability of the plant to produce new plant material (efficiency index).
Explanation: r is the relative growth rate and also measures the ability of the plant to produce new plant material (efficiency index).
Q.6.
Opening of floral buds into flowers, is a type of:
- Autonomic movement of variation
- Autonomic movement of locomotion
- Autonomic movement of growth
- Paratonic movement of growth
Answer:
(c) Autonomic movement of growth
Q.7.
Which one is incorrect?
- Epiblast is presumptive ectoderm and mesoderm
- Hypoblast is presumptive endoderm
- Hypoblast is presumptive mesoderm
- Upper layer of cells in blastoderm is epiblast
Answer:
(c) Hypoblast is presumptive mesoderm
Explanation: Upper layer of cells in blastoderm is epiblast
Explanation: Upper layer of cells in blastoderm is epiblast
Q.8.
The stage of rapid cell division just after fertilization is
- Organogenesis
- Cleavage
- Gastrulation
- Growth
Answer:
(b) Cleavage
Q.9.
Which one of the followings is a gaseous plant hormone?
- Ethylene
- Gibberellin
- IAA
- Abscisic acid
Answer:
(a) Ethylene
Explanation: Ethylene
Explanation: Ethylene
Q.10.
To prevent over – ripening, bananas should be
- given a dip in ascorbic acid
- maintained at room temperature
- refrigerated
- stored at the top of refrigerator
Answer:
(c) refrigerated
Explanation: refrigerated
Explanation: refrigerated
Q.11.
Growth in dorsiventral leaf is measured in terms of
- length of leaf
- increase in cell number
- surface area increase
- none of these
Answer:
(c) surface area increase
Explanation: Increase in surface area denotes the growth in a dorsiventral leaf
Explanation: Increase in surface area denotes the growth in a dorsiventral leaf
Q.12.
Plants grow throughout their life due to
- presence of meristems
- presence of vascular cambium
- presence of xylem and phloem
- presence of tracheids
Answer:
(a) presence of meristems
Explanation: Plants growth throughout their life due to the presence of meristems at certain locations in their body.
Explanation: Plants growth throughout their life due to the presence of meristems at certain locations in their body.
Q.13.
Mechanism of development was explained by
- Hans Dietrisch
- Spemann
- Both a and b
- Haemmerling
Answer:
(c) Both a and b
Explanation: Haemmerling
Explanation: Haemmerling
Q.14.
The ability to regain or recover the lost or injured part of body is
- Aging
- Regeneration
- Abnormal development
- Primary inductio
Answer:
(b) Regeneration
Explanation: Regeneration
Explanation: Regeneration
Q.15.
Which growth hormone accerlates the malting process in brewing industry?
- Auxins
- Gibberellins
- Ethylene
- Cytokinins
Answer:
(b) Gibberellins
Explanation: Gibberellins especially GA3 is used to speed up the malting process in brewing industry
Explanation: Gibberellins especially GA3 is used to speed up the malting process in brewing industry
Q.16.
Which plant growth regulator is the derivative of carotenoids?
- Auxin
- Gibberelic acid
- Cytokinin
- Abscisic acid
Answer:
(d) Abscisic acid
Explanation: Abscisic acid are the derivatives of carotenoids.
Explanation: Abscisic acid are the derivatives of carotenoids.
Q.17.
Typical plant growth shows _________ curve.
- J-shaped
- S-shaped
- I-shaped
- Parabolic
Answer:
(b) S-shaped
Explanation: Typical plant growth represents sigmoid curve.
Explanation: Typical plant growth represents sigmoid curve.
Q.18.
Mobilisation of stored food in germinating seeds is triggered by
- auxins
- cytokinins
- gibberellins
- ethylene
Answer:
(c) gibberellins
Q.19.
Cavity formed between somatic and splanchnic mesoderm is called
- Gastrocoele
- Blastocoele
- Coelom
- Neurocoele
Answer:
(c) Coelom
Q.20.
IAA is naturally occurring plant hormone called
- Gibberlin
- Auxin
- Cytokinin
- Absicic acid
Answer:
(b) Auxin
Explanation: Auxin
Explanation: Auxin
Q.21.
Auxin is synthesised from in apical meristem from amino acid
- Isoleucine
- Methionine
- Niacin
- Tryptophan
Answer:
(d) Tryptophan
Q.22.
Growth regulator which induces parthenocarpy
- IAA
- ABA
- Cytokinin
- Ethylene
Answer:
(a) IAA
Q.23.
Formation of seedless fruit without act of fertilisation
- Parthenocarpy
- pseudocarpy
- Apomixis
- Parthenogenesis
Answer:
(a) Parthenocarpy
Explanation: Parthenocarpy
Explanation: Parthenocarpy
Q.24.
The major site for production of gibberellin is
- Embryos
- Roots
- Young leaves
- All of these
Answer:
(d) All of these
Q.25.
Gibberellin is isolated from
- Brian et al
- Went
- Yabuta
- Kurosawa
Answer:
(a) Brian et al
Explanation: Brian et al
Explanation: Brian et al
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