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Plant Growth and Development

Multiple Choice Questions

141.

Artificial application of auxins like IAA, IBA and NAA to unpollinated pistils can form

fruits with much flash
larger fruits
sweet fruits
seedless fruits

142.

Internodal elongation is stimulated by

auxin
cytokinin
gibberellin
phenol

143.

Flash of light in dark inhibits flnwering in

SDP
LDP
LSDP
DNP

144.

Plant length is increased by

apical meristem
lateral meristem
dermarogen
periblem

145.

The mutagenic agent among following is

ethyl methane
ethylene
2, 4-D
IAA

146.

Which one of the following is a natural growth inhibitor?

147.

Which one is a short day plant?

Brassica campestris
Raphanus sativus
Glycine max
Papaver somniferum

148.
Leaf abscission is caused by

ABA

cytokinin

auxin

gibberellin

ABA

Abscission is the fall of leaves and fruits. Abscisic acid (ABA). a stress hormone, accelerated leaf abscission in cotton plants. Since, then it is believed that cause of abscission is the presence of growth inhibiting hormone (ABA), but its universal role for abscission is yet to be established.