Arrange the evolutionary human species in their occurrence from recent to the oldest order.
(A) Australopithecus
(B) Homo erectus
(C) Homo sapiens
(D) Neanderthal man
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Sex chromosomes of female in chicken are:

Identify the statement which do not hold true for Deoxyribose Nucleic Acid.
A. Only purine bases are present in DNA.
B. Deoxyribose sugar is present
C. A nitrogenous base is linked to the \(1^{\prime} C\) pentose sugar through N- glycosidic linkage.
D. Phosphate group is linked to OH of \(4 ^{\prime} C\) of a nucleotide.
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Identify the correct sequence of steps required for performing gel electrophoresis :
(A) Staining the DNA with ethidium bromide and its visualization under UV light
(B) DNA fragmentation by restriction endonuclease
(C) Separation of DNA fragments by electrophoresis.
(D) Loading the DNA in agarose gel
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The elucidation of the lac operon was the result of close association between the geneticist ______ and the biochemist ______.

Which one of the following structures is not the male sex accessory duct in human?

Read the passage carefully and answer the questions given along
Our immune system plays the major role in preventing diseases when we are exposed to disease-causing agents. Immunity is of two types: (i) Innate immunity and (ii) Acquired immunity. The human immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies. The immune system also plays an important role in allergic reactions, auto-immune diseases and organ transplantation. The primary lymphoid organs are bone marrow and thymus. The secondary lymphoid organs are spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. There is lymphoid tissue also located within the lining of the major tracts (respiratory, digestive and urogenital tracts) called mucosa associated lymphoid tissue (MALT). It is important to note that HIV/AIDS is not spread by mere touch or physical contact; it spreads only through body fluids. AIDS has no cure, prevention is the best option. Adolescence is accompanied by several biological and behavioural changes and surveys and statistics show that use of drugs and alcohol has been on the rise especially among the youth. Factors associated with drug and alcohol abuse among adolescents are a child's natural curiosity, stress, the perception among youth that it is 'cool' or progressive to smoke, media exposure and an unstable or unsupportive family structures and peer pressure. It is best to identify the situations that may push an adolescent towards use of drugs or alcohol, and to take remedial measures well in time.
Which one of the following can never be over estimated when it comes to the complete well-being of adolescents?

Identify the correct statements with respect to microbes.
A. 'Toddy' the traditional drink obtained by fermenting sap of Palm tree.
B. Swiss cheese's large holes are due to activity of Saccharomyces cerevisae.
C. 'Penicillin' was discovered by Alexander Fleming.
D. The Cyclosporin A, is produced by Trichoderma polysporum.
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What can be the product of Hoffmann bromamide degradation reaction?

The area of the region bounded by the curves \(y=x^2+2, y=-x, x=0\) and x = 1 is :

From the binding energy per nucleon versus mass number curve :
(A) B.E/nucleon is small for light nuclei like \( {}_{1}^{1}H, {}_{1}^{2}H, {}_{1}^{3}H \)
(B) B.E/nucleon decreases in heavy nuclei making them less stable stab.
(C) When two light nuclei combine to form heavy nucleus, energy is absorbed.
(D) Heavy nucleus splits into lighter nuclei which results in liberation of energy.
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Arrange the given stages in spermatogenesis sequentially :
(A) Spermatid
(B) Primary spermatocytes
(C) Spermatogonia
(D) Secondary spermatocytes
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Mercury is the only liquid metal at room temperature due to: