Match the stages of meiosis in column I to their characteristic features in column II and select the correct option using the codes given below.

Column \(-I\)	Column \(-II\)
(A) Pachytene	(i) Pairing of homologous chromosomes
(B) Metaphase\(-I\)	(ii) Terminalisation of chiasmata
(C) Diakinesis	(iii) Crossing-over takes place
(D) Zygotene	(iv) Chromosomes align at equatorial plate

Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogentc action\(?\) \((a)\) Darwin's Finches of Galapagos islands. \((b)\) Herbicide resistant weeds. \((c)\) Drug resistant eukaryotes. \((d)\) Man\(-\)created breeds of domesticated animals like dogs.

Given below are two statements :
Statement I : Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II : RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below :

The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic substrate.

Given below are two statements about this method:
Statement I : The blue coloured colonies have DNA insert in the plasmid and they are identified as recombinant colonies.

Statement II : The colonies without blue colour have DNA insert in the plasmid and are identified as recombinant colonies.

In the light of the above statements, choose the most appropriate answer from the options given below:

Which one of the following groups of animals reproduces only by sexual means?

Match the following columns and select the correct option.

Column \(- I\)	Column \(- II\)
\((a)\) Eosinophils	\((i)\) Immune response
\((b)\) Basophils	\((ii)\) Phagocytosis
\((c)\) Neutrophils	\((iii)\) Release histaminase, destructive enzymes
\((d)\) Lymphocytes	\((iv)\) Release granules containing histamine

\((a)\quad(b)\quad(c)\quad(d)\)

The ovary is half inferior in

Which of the following characteristics is mainly responsible for diversification of insects on land?

In photosynthesis, the light­independent reactions take place at

 Match List \(I\) with List \(II\).

List \(I\)	List \(II\)
\(A\). \(P\)-wave	\(I\). Beginning of systole
\(B\). \(Q\)-wave	\(II\). Repolarisation of ventricles
\(C\). \(QRS\) complex	\(III\). Depolarisation of atria
\(D\). \(T\)-wave	\(IV\). Depolarisation of ventricles

Choose the correct answer from the options given below :

A body of mass \(1\, kg\) begins to move under the action of a time dependent force  \(\overrightarrow {\;F\;} = (2t\hat i + 3{t^2}\hat j\)) \(N\) where \(\hat i\) and \(\hat j\) are unit vectors along \(x\) and \(y\) axis. What 10.Power will be developed by the force at the time \(t\)?

Which of the following most appropriately describes haemophilia?

Which of the following alkane cannot be made in good yield by Wurtz reaction\(?\)