Short Answer TypeGive reasons for the following:
Secondary growth does not occur in monocot stems.Secondary growth does not occur in monocot stems as they contain closed collateral vascular bundle, i.e. they do not have cambium which is responsible for the secondary growth and thus no secondary growth occurs in monocots.
Give reasons for the following:
Nitrogenous fertilisers are not applied in fields where leguminous crops grow.
Give reasons for the following:
At higher temperatures, green plants start evolving CO2 instead of O2.
State the best known contribution of:
(i) Alec Jeffery
(ii) P.K. Sethi
(iii) Hugo de Vries
Long Answer Type(a) Name and define the three types of natural selection.
(b) State the following:
(i) Hardy Weinberg’s principle
(ii) Theory of recapitulation
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