Identify the correct statements with respect to human evolution
A. Modern Homo sapiens arose during ice age between 50,000 to 75,000 years.
B. Ramapithecus was more man-like.
C. The brain capacity of Homo erectus was about 650-800 cc.
D. Dryopithecus was more ape-like.
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Factors that do not affect Hardy-Weinberg equilibrium are:
(A). Genetic drift
(B). Mitosis
(C). Genetic recombination and natural selection
(D). Pleiotropy
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In the species-area relationship equation, log S = log C + Z log A, 'Z' denotes -

In gel electrophoresis, the natural polymer agarose gel used as medium is extracted from:

If a host fish species becomes extinct and its unique assemblage of parasites also meets extinction, this is an example of:

Read the passage carefully. Attempt the questions.
An overwhelming majority (99 per cent) of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. In aquatic animals, the osmotic concentration of the body fluids change with that of the ambient air and water osmotic concentration. These animals and plants are simply conformers. Considering the benefits of a constant internal environment to the organism, we must ask why these conformers had not evolved to become regulators. Recall the human analogy we used above; much as they like, how many people can really afford an air conditioner? Many simply 'sweat it out' and resign themselves to suboptimal performance in hot summer months. Very small animals are rarely found in polar regions. During the course of evolution, the costs and benefits of maintainin a constant internal environment are taken into consideration. Some species have evolved the ability to regulate, but only over a limited range of environmental conditions, beyond which they simply conform.
If the stressful external conditions are localised or remain only for a short duration, the organism has five other alternatives for survival.
Identify the animal which is NOT a conformer.

Alcohol is a depressant, which means that even small amounts of alcohol slow down the actions of parts of the brain, so alcohol lengthens the time you take to respond to a stimulus.
Different people react differently to alcohol. In some people, it increase their feelings of aggression, and releases their inhibitions so that they are more likely to be violent or commit other crimes.
An alcoholic needs to drink quite large quantities of alcohol regularly. This causes many parts of the body to be damaged, because alcohol is poisonous to cells. Probably, there are many factors which decide whether or not a person becomes alcoholic. Over a long period of time, it can cause loss of memory and confusion. One way in which the damage is done is that alcohol in the body fluids draws water out of cells by osmosis.
Withdrawal symptoms of alcohol are __________

Identify the solution which is nearly ideal in behaviour

Consider the following statements about the physical and chemical characteristics of interstitial compounds and identify the correct statements
(A) They have high melting points.
(B) They are very hard.
(C) They retain metallic conductivity.
(D) They are chemically very reactive.
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Read the passage carefully and answer the Questions
The concentration dependence of the rate of a reaction is called the differential rate equation. It is not always convenient to determine the instantaneous rate, as it is measured by calculating the slope of the tangent at point 't' in the concentration vs time plot. This makes it difficult to determine the rate and hence the order of the reaction. This difficulty is overcome by integrating the differential rate equation. This integrated rate equation gives a direct relation between concentrations at different times and the rate constant. The integrated rate equations are different for the reactions having different reaction orders.
For an integrated first order reaction, a straight line graph is plotted. The incorrect co-ordinates and resulting slope of the graph are

The aqueous solutions of \(ZnSO _4, AgNO _3, FeCl _3\) and \(WCl _6\) are electrolysed for 2 hours using a current of 5 amperes. The decreasing order of mass deposited of the following metals at the cathode will be:
(A) Zn
(B) Ag
(C) Fe
(D) W
(Atomic masses:\(Fe =56 g mol ^{-1}, Zn =65 g mol ^{-1}\),\(\left.Ag =108 g mol ^{-1}, W=184 g mol ^{-1}\right)\)
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Match List-l with List-ll
Let \(A\) be any invertible square matrix. Then

List-l	List-ll
(A) \(A-A^T\)	(I) \(|A| A^{-1}\)
(B) \(A A^T\)	(II) Skew-symmetric
(C) \(\operatorname{det}\left(A^{-1}\right)\)	(III) Symmetric
(D) \(\operatorname{adj} A\)	(IV) \([\operatorname{det}(A)]^{-1}\)

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For a substance at a given temperature, the osmotic pressure of its concentrated solution: