The plants respond to photoperiods due to the presence of
enzymes
stomata
phytochromes
phytohormones
Gibberellin is helpful in
fat hydrolysis
protein synthesis
inducing dwarfism
elongation of plants
Seedless water-melons are obtained by
haploidy
triploidy
gibberellin application
vegetative propagation
Which one of the following four glands is correctly matched with the accompanying description?
thymus - starts undergoing atrophy after puberty
thyroid - hyperactivity in young children causes cretinism
pancreas - delta cells of the islets of Langerhans secrete a hormone which stimulates glycolysis in liver
parathyroid - secretes parathormone which promotes movement of calcium ions from blood into bones during calcification
Which of the following induces cell division ?
ABA
auxin
cytokinin
gibberellin
Genetic dwarfness can be overcome by treating it with
ethylene
anti-gibberellin
Which among the following is a synthetic plant hormone?
IAA
GA
2,4-D
Acromegaly is due to the hypersecretion of
insulin
thyroxin
prolactin
growth hormone
Where in the brain are neurosecretory cells located?
Hypothalamus
Thalamus
Medulla
None of these
Which gland helps the body to survive in emergency situations?
Thyroid gland
Adrenal gland
Pineal gland
