Which of the following is a day neutral plant
Helianthus annuus
Euphorbia pulcherrima
Avena sativa
Beta vulgaris
A.
Helianthus annuus
Day neutral plants do not need a specific photoperiod to produce flowers. They are also called intermediates or photoneutrals. Their photoperiod varies from a few hours to 24 hours of uninterrupted light e.g. tomato, cucumber, sunflower, Helianthus annuus, maize and cotton etc.
Pencils are prepared from the wood of
Pinus vinaster
Juniperus virginiana
Chamaecyparis piscifera
Abies pindrow
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.
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.
