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Morphine, which is used as an analgesic is obtained from

Taxus brevifolia
Papaver somniferum
Cinchona officinalis
Berberis nilghiriensis
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The common nitrogen-fixer in paddy fields is

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The symbiotic association of fungi with the roots of higher plants is called:

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What is the common name of Drosophila melanogaster?

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Which of the following is a gram-negative bacterium?

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Study the following lists:

List - IList - II
(A)Usage of bisexual flowers as female parents(I)Clonal selection
(B)Incorporation of several desirable characters into a single variety(II)Pure line selection
(C)Exploiting hybrid vigour for many generations(III)Emasculation
(D)Improving local varieties of self pollinated crop(IV)Hybridization
(V)Polyploidy breeding

The correct match is:

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The term antibiotic was coined by:

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Which of the following is added to milk to curdle it or produce fermented milk products?

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Physical removal of large and small from the sewage through filtration and sedimentation is called:

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Which of the following will begin fixing nitrogen only after they stop reproducing?

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Which of the followings is also called sac fungi that live parasitically and in various habitats?

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