pg and d

The biological activity of I.A.A is tested by :-

• Avena curvature test

• a - amylase test

• Endosperm activity test

• Chlorophyll preservation test

Apical dominance means :-

• Suppression of growth of apical bud by axillary

  buds

• Suppression of growth of axillary buds by the

  presence of apical bud.

• Stimulation of growth of axillary buds by removal

  of apical bud

• Inhibition of growth of axillary buds by removal

  of apical bud.

What causes a green plant exposed to the light on

only one side, to bend toward the source of light as

it grows ?

• Green plants seek light because they are

  phototropic

• Light stimulates plant cells on the lighted side to

  grow faster

• Auxin accumulates on the shaded side,

  stimulating greater cell elongation there.

• Green plants need light to perform photosynthesis

Which set among the following represent auxins?

• IBA, IAA, NAA

• IAA, BAP, NAA

• 2,4-D, GA3, IAA

• 2,4-D, GA3, NAA

Which of the following is not the function of Auxin ?

• Control xylem differentiation and induce cell

  division

• 2-4-D is used as herbicide for dicot weeds

• Promote fruit ripening

• Induce parthenocarpy

Which of the following is a regulatory pigment?

• Xanthophyll

• Phytochrome

• Carotene

• Chlorophyll

Arithmetic growth is related to :-

• Lt = L0ert

• W1 = W0ert

• Lt = L0 + rt

• L0 = Lt + rt

Assertion :- Growth is one of the part of plant

development.

Reason :- Development is overall process from

birth to death and is sum of growth and

differentiation.

• both Assertion & Reason are True &

  the Reason is a correct explanation of the Assertion

• only assertion is correct

• both wrong

• both correct

Assertion :- During arithmetic growth there is

growth at constant rate.

Reason :- During arithmetic growth only one cell

continuously add meristem.

• both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

• only assertion is correct

• both incorrect

• both correct

Assertion :- Flowering in plants depends only on

a combination of light and dark exposure.

Reason :- Flowering is not dependent on relative

duration of light and dark hours.

• both Assertion & Reason are false.

• both are correct

• only reason is incorrect

• only assertion is correct