If sewage water is added to river water, it will:

Match List-I with List-II

List-I ( Terms)	List-II (Examples/Explanations)
(A) Homology	(I) Forelimbs of mammals
(B) Analogy	(II) Wings of birds and butterfly
(C) Convergent evolution	(III) Common habitat and function
(D) Divergent evolution	(IV) Common ancestry of structure

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Match List I with List - II.

List - I	List - II
(A) Produces crystals of toxic insecticidal proteins	(I) Meloidegyne incognitia
(B) Nematode which infects the roots of tobacco plant	(II) Agrobacterium tumefaciens
(C) Vector used to transfer the nematode specific gene into the host plant was obtained from	(III) Bacillus thuringiensis
(D) Plasmids used to produce the insulin chains were obtained from	(IV) Propionibacterium sharmanii
	(V) Eshcherichia coli

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Periodic abstinence is an example of:

Which one of the following regions will have the least number of bird species?

Which one of the following takes place in all eukaryotic organisms as a method of cellular defense?

The large holes in 'Swiss cheese' are due to -

\(\int \frac{\log _e x}{\left(1+\log _e x\right)^2} d x\)2 is equal to

A letter is known to have come from either TATAPUR or from CHAKRATA. On the envelope, only two letters "TA" are visible consecutively. The probability that the letter has come from CHAKRATA is :

An electric dipole is placed parallel to the electric field. If W is the work done in rotating the dipole by \(30^\circ\), then work done in rotating it by \(180^\circ\) is:

Read the passage carefully and answer:
Organic compounds derived from NH3 by replacing one or more H-atoms with alkyl or aryl groups will form primary, secondary and tertiary amines. The common methods which include their preparations are reduction of nitro group, amide group and nitrile group, Gabriel phthalimide synthesis and ammonolysis of alkyl halides. Amines are basic in nature due to the presence of a lone pair of electrons on the nitrogen atom. Important chemical properties of amines include acylation, alkylation and their interaction with nitrous acid. There are various tests which can distinguish different types of amines from each other, for e.g. carbylamine test, Hinsberg's test, coupling reaction etc. Another important class of compounds which can be derived from primary amines is azo compounds. These compounds are intensely colored and widely used as dyes in textile, leather and food industries.
How many different structural isomers that correspond to the molecular formula \(\mathrm{C}_3 \mathrm{H}_9 \mathrm{~N}\) are possible? Out of these, how many will give a positive carbylamine test?

Match List - I with List - II.

List - I	List - II
(A) Gel	(I) Hair cream
(B) Foam	(II) Dust
(C) Emulsion	(III) Cheese
(D) Aerosol	(IV) Whipped cream

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Which of the following statements is not correct about cell potential?