Assertion : In case of vegetatively propagated crops, pure-line selection is not required. Reason :

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Strategies for Enhancement in Food Production

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Assertion : In case of vegetatively propagated crops, pure-line selection is not required.

Reason : Hybrid vigour is mostly used in vegetatively propagated plants.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

(AIIMS-2013)

Solution

In case of vegetatively propagated crops, pure line selection is not required. Pureline selection is useful only for sexually reproducing plants. Hybrid vigour is most profitably used in vegetatively propagated crops because they do not involve sexual reproduction and hence no loss of hybrid superiority.

Standard 12

Biology

Bean seeds were planted and put on a sunny windowsill. As the plants grew, their stems bent toward the window. This bending was most likely caused by an

normal

(AIIMS-2009)

Match following columns.

Column $- I$ Column $- II$

$(a)$ Cross breeding $(x)$ Jaya, Ratna

$(b)$ Interspecific hybridization $(y)$ Saccharum barberi

$(c)$ Better – yielding semi – dwarf varieties $(z)$ Hirsadale

$(d)$ South Indian variety of sugar cane $(w)$ Mule

$(v)$ Saccharum officinarum

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Assertion : Yeasts such as Saccharomyces cerevisiae are used in baking industry.

Reason : Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.

normal

(AIIMS-2015)

‘Bombyx mori' feeds on or Food of silk worm is

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Genetic engineering is possible, because

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(AIPMT-1998)

Column $- I$	Column $- II$
$(a)$ Cross breeding	$(x)$ Jaya, Ratna
$(b)$ Interspecific hybridization	$(y)$ Saccharum barberi
$(c)$ Better – yielding semi – dwarf varieties	$(z)$ Hirsadale
$(d)$ South Indian variety of sugar cane	$(w)$ Mule
	$(v)$ Saccharum officinarum

Assertion : In case of vegetatively propagated crops, pure-line selection is not required. Reason : Hybrid vigour is mostly used in vegetatively propagated plants.

Solution

Similar Questions

Bean seeds were planted and put on a sunny windowsill. As the plants grew, their stems bent toward the window. This bending was most likely caused by an

Match following columns. Column $- I$ Column $- II$ $(a)$ Cross breeding $(x)$ Jaya, Ratna $(b)$ Interspecific hybridization $(y)$ Saccharum barberi $(c)$ Better – yielding semi – dwarf varieties $(z)$ Hirsadale $(d)$ South Indian variety of sugar cane $(w)$ Mule $(v)$ Saccharum officinarum

Assertion : Yeasts such as Saccharomyces cerevisiae are used in baking industry. Reason : Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.

‘Bombyx mori' feeds on or Food of silk worm is

Genetic engineering is possible, because

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Assertion : In case of vegetatively propagated crops, pure-line selection is not required.

Reason : Hybrid vigour is mostly used in vegetatively propagated plants.

Assertion : Yeasts such as Saccharomyces cerevisiae are used in baking industry.

Reason : Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.