Plant Growth and Development - 03-01-24

Under certain conditions regaining the lost capacity of division by living cells is called –

• (a) Dedifferentiation

• (b) Redifferentiation

• (c) Differentiation

• (d) Efficiency index

Which one(s) is/are redifferentiated cell(s)?

• (a) Cork

• (b) Secondary cortex

• (c) Both

• (d) None

Differentiation in plant is open because cells / tissues arising out of the same meristem –

• (a) have same structure at maturity

• (b) Have different structures at maturity

• (c) Have capacity to disappear their cell walls

• (d) Have same fate

Which of the following includes all three process –

• (a) Differentiation

• (b) Cell enlargement

• (c) Seed germination, senescence

• (d) Development

The ability of plant to follow different pathways and produce different structures in response to environment and phases of life is termed as –

• (a) Elasticity

• (b) Growth efficiency

• (c) Plasticity

• (d) Heterophylly

Environmental heterophylly is seen in –

• (a) Ranunculus (Buttercup)

• (b) Cotton

• (c) Coriander

• (d) Larkspur

Intrinsic factors affecting development include –

• (a) Intracellular (genetic) factors

• (b) Intercellular factors like light

• (c) Intercellular factors like PGRs

• (d) a and c

The correct match is –

• (a) I - B, II - A, III - E, IV - D, V - C

• (b) I - A, II - B, III - C, IV - D, V - E

• (c) I - E, II - D, III - A, IV - B, V - C

• (d) None

Which one includes growth promoters?

• (a) Auxin, Cytokinin, ABA

• (b) GA, Cytokinin, C₂H₄

• (c) C₂H₄, ABA

• (d) Auxin, Cytokinin, GA

The historical experiment on canary grasses coleoptile as a first step in the discovery of auxin was conducted by–

• (a) Darwin

• (b) Went

• (c) Kogl

• (d) Kurosawa