In This Post we are  providing Chapter-15 Plant Growth and Development NCERT MCQ for Class 11 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON PLANT GROWTH AND DEVELOPMENT

Question 1.

Which plant growth regulator is the derivative of carotenoids?
(a) Auxin
(b) Gibberellic acid
(c) Cytokinin
(d) Abscisic acid

Answer (d) Abscisic acid

Question 2.
Intercalary meristems are of
(a) Permanent nature
(b) Temporary nature
(c) Some are permanent some temporary
(d) None of these

Answer: (b) Temporary nature

Question 3.
Cells of fibers and tracheid’s elongate during
(a) Phase of cell division
(b) Phase of cell elongation
(c) Phase of cell maturation
(d) Phase of cell differentiation

Answer: (a) Phase of cell division

Question 4.
Typical plant growth shows _________ curve.
(a) J-shaped
(b) S-shaped
(c) I-shaped
(d) Parabolic

Answer: (b) S-shaped
Explanation:
Typical plant growth represents sigmoid curve.

Question 5.
Exponential growth of the plants is express as W1 = W0 ert r represents
(a) ability of the plant to produce new cells
(b) efficiency index
(c) relative growth rate
(d) 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).

Question 6.
Opening of floral buds into flowers, is a type of:
(a) Autonomic movement of variation
(b) Autonomic movement of locomotion
(c) Autonomic movement of growth
(d) Paratonic movement of growth

Answer: (c) Autonomic movement of growth

Question 7.
Which one is incorrect?
(a) Epiblast is presumptive ectoderm and mesoderm
(b) Hypoblast is presumptive endoderm
(c) Hypoblast is presumptive mesoderm
(d) Upper layer of cells in blastoderm is epiblast

Answer: (c) Hypoblast is presumptive mesoderm

Question 8.
The stage of rapid cell division just after fertilization is
(a) Organogenesis
(b) Cleavage
(c) Gastrulation
(d) Growth

Answer: (b) Cleavage

Question 9.
Plants grow throughout their life due to
(a) presence of meristems
(b) presence of vascular cambium
(c) presence of xylem and phloem
(d) presence of tracheid

Answer: (a) presence of meristems
Explanation:
Plants growth throughout their life due to the presence of meristems at certain locations in their body.

Question 10.
Liver and pancreas arise from
(a) Foregut
(b) Midgut
(c) Hindgut
(d) None of these

Answer: (a) Foregut

Question 11.
Which one of the followings is a gaseous plant hormone?
(a) Ethylene
(b) Gibberellin
(c) IAA
(d) Abscisic acid

Answer: (a) Ethylene

Question 12.
To prevent over – ripening, bananas should be
(a) given a dip in ascorbic acid
(b) maintained at room temperature
(c) refrigerated
(d) stored at the top of refrigerator

Answer: (c) refrigerated

Question 13.
Growth in dorsiventral leaf is measured in terms of
(a) length of leaf
(b) increase in cell number
(c) surface area increase
(d) none of these

Answer: (c) surface area increase
Explanation:
Increase in surface area denotes the growth in a dorsiventral leaf.

Question 14.
Mechanism of development was explained by
(a) Hans Dietrich
(b) Spemann
(c) Both a and b
(d) Haemmerling

Answer: (c) Both a and b

Question 15.
The ability to regain or recover the lost or injured part of body is
(a) Aging
(b) Regeneration
(c) Abnormal development
(d) Primary induction

Answer: (b) Regeneration

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