Biology : Plant Growth and Development

Which of the following is called stress hormone?

• Abscisic acid

• Auxin

• Cytokinin

• Gibberellic acid

During seed germination its stored food is mobilised by

• ethylene

• cytokinin

• ABA

• gibberellin

Vascular tissue in higher plants develop from which of the following

• Procambium 

• Protoderm

• Periblem

• Cortex

Name of a gaseous plant hormone is

• IAA

• gibberellin

• ethylenes

• abscisic acid

Cellular totipotency was first demonstrated by

• F C Steward

• Robert Hooke

• T Schwann

• A v Leeuwenhoek

The discovery of gibberellins is related with one of the following

• blast disease of rice

• rust disease of wheat

• bakane disease of rice

• early blight disease of potato

Choose the minor carp from the following

• Cyprinus carpio

• Anguilla sp

• Labeo bata

• cetanophyrngodon idella

A substance that induces dormancy of seed is

• ABA

• GA

• thio-urea

• cytokinin

Which one of the following is a growth regulator produced by plants?

• Naphthalene acetic acid

• Zeatin

• 2,4-dichlorophenoxy acetic acid

• Benzyl aminopurine

Flowering dependent on cold treatment is

• cryotherapy

• cryogenics

• cryoscopy

• vernalisation