CBSE
Multiple Choice Questions2,4- D is an effective
fungicide
weedicide
rodenticide
wormicide
Pencils are prepared from the wood of
Pinus vinaster
Juniperus virginiana
Chamaecyparis piscifera
Abies pindrow
The dormancy of seed is regulated by
ABA
Ethylene
GA- 3
Dihydrozeatin
Auxin in plant means for
cell elongation
fruit ripening
cell division
inhibit the root growth
Ageing is retarded by
ABA
CKN
GA
C2H4
Identify the incorrect statement about ABA growth regulator
It increases the tolerance of plants against different stresses.
It acts as general plant growth inhibitor and inhibitor of metabolism.
It helps in seed maturation and dormancy.
It promotes morphogenesis and differentiation of shoots.
Which of the following is an antigibberellin
Auxin
Ethylene
ABA
Cytokinin
Agricultural chemicals include
growth regulators
fertilizers
pesticides
all of these
Assertion: Secondary metabolites are produced in small quantities and their extraction from the plant is difficult and expensive.
Reason: Secondary metabolites can be commercially produced by using tissue culture technique.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Which of the following is a day neutral plant
Helianthus annuus
Euphorbia pulcherrima
Avena sativa
Beta vulgaris
