During transcription process in eukaryotes, 'capping' involves:

The Convention on Biological Diversity held in Rio de Janeiro in 1992 is
popularly known as

Which of the following is an example of 'Ex-situ Conservation' of threatened animals and plants?

Read the given passage and answer the following questions:
Secondary treatment or biological treatment: The primary effluent is passed into large tanks where air is pumped into it. This allows vigorous growth of aerobic microbes. While growing, these microbes consume the major part of the organic matter in the effluent. This significantly change the BOD (biochemical oxygen demand) of the effluent. The effluent in then passed into a tank a small part of the sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called sludge digesters. Here, other kinds of bacteria grow anaerobically in the sludge. The biogas produced can be used source of energy as it is inflammable. The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
The biogas is a mixture of the following gases

Arrange the stages of microsporogenesis in their order of occurrence
(A) Development of pollen from microspores
(B) Formation of microspore tetrad
(C) Sporogenous tissue occupies the center of microsporangium
(D) Meiotic division in the cells of sporogenous tissue
Choose the correct answer from the options given below:

Identify the statements which are incorrect with respect to medical termination of pregnancy:
(A) MTP is relatively safe during the first trimester of pregnancy
(B) Govt. of India legalised MTP in 1981
(C) MTP is misused to get rid of desired sex determined through amniocentesis
(D) MTP is essential in cases where foetus is found to carrying harmful genes
Choose the correct answer from the options given below:

Match List - I with List - II.

List-I	List-II
(A) Cuckoo lays egg in crow’s nest	(IV) Brood parasitism
(B) Orchid grows in mango tree	(I) Commensalism
(C) Ticks live on skin of dogs	(II) Parasitism
(D) Species of Wasp and fig species	(III) Mutualism

Choose the correct answer from the options given below :

A parallel beam of light of wavelength 500 nm is incident normally on a slit of width d. If the distance between slit and screen is 0.6 m and distance of second order minimum from the centre of the screen is 6.0 mm, What is the width of the slit?

Identify the commensalism from the following associations:

Amines are reactive in nature, mainly due to difference in electronegativity between Nitrogen and Hydrogen and, due to lone pair of electrons on Nitrogen. Amines behave like nucleophiles and as good lewis bases and there are various reactions to support this. Different degree of amines differ in their reactivity due to steric hinderance and electronic effects. Aromatic amines are less basic due to + R effect,
hence have higher pkb value than aliphatic amines. Basic strength of amines also depends on stability of corresponding conjugate acid in aqueous medium.
'A' compound is treated with Hinsenberg's reagent, subsequent additiom of alkali to it gives a clear solution. Compound ' A ' is:

Two nuclei with mass numbers A and B have density ratios of :

If focal length of a concave lens is 50 cm, then the power of the lens would be

In a Young's double slit experiment, the fringe width is \(\beta\). If the entire apparatus is immersed in a liquid of refractive index \(\mu\), the new fringe width is