Match List I with List - II. -

List – l (Terms)	List – II (Linked to)
(A) Divergent evolution	(l) Branching descent
(B) Convergent evolution	(II) Geographical habitats
(C) Adaptive radiation	(III) Analogous structures
(D) Natural selection	(IV) Homologous structures

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Which one of the following property is exhibited by Datura plant?

In the species-area relationship equation, log S = log C + Z log A, 'Z' denotes -

Identity the statements which are true for figure 'X' and 'Y' ?
(A) Figure 'X' shows an ideal pyramid of energy
(B) Figure 'X' shows sharp decrease in biomass at higher trophic levels.
(C) Figure 'Y' shows pyramid in which a small standing crop of primary producers support a large standing crop of primary consumers.
(D) Figure 'Y' shows the flow of energy in a pyramid.
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Which one of the following hormones is not secreted by the placenta?

Inactive protoxins is converted into its active toxin by:

Match List-I with List-II

List-I(Stages of Human Evolution)	List-II (Characteristics)
(A) Ramapithecus	(I) Lived in East African grasslands
(B) Australopithecus	(II) Lived near East and central Asia
(C) Homo habilis	(III) Hairy and walked like gorillas
(D) Neanderthal Man	(IV) First human like being

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p-block elements are placed in groups 13 to 18 of the periodic table. Group 15 is nitrogen family.
Nitrogen makes various compounds like \(NH _3, HNO _3, N_2 O , NO _2\) etc. Phosphorus exists in the form of white and red phosphorus. White phosphorus glows in dark. \(PH _3\) gas is used as smoke screen. Group 16 is called oxygen family. Dry air contains \(21% O_2\) gas by volume. Combined sulphur exists as sulphates such as gypsum, epsome salt, baryte etc. The allotropic forms of sulphur are Rhombic and monoclinic sulphur. \(S_2\) is paramagnetic like \(O_2\) and it stable at high temperature. Group 17 is Halogen family. \(F _2\) is highly reactive, \(Cl _2\) is greenish yellow gas. Both \(SO _2\) and \(Cl _2\) are used for bleaching. Group 18 is Noble gas family but some noble gases also form compounds.
Complete hydrolysis of \(XeF _6\) gives HF and \(XeO _3\) as main products. The permanent bleaching effect is caused by :

Match List I with List II.

List-I	List-II
A. \(XeF _6\)	I. \(sp ^3 d^3\) - Distorted octahedral
B. \(XeO _3\)	II. \(sp ^3 d^2\) - Square planer
C. \(XeOF _4\)	III. \(sp ^3\) – Pyramidal
D. \(XeF _4\)	IV. \(sp ^3 d^2\) - Square pyramidal

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Arrange in increasing order of number of species to represent global biodiversity?
(A) Molluscs
(B) Crustaceans
(C) Insects
(D) Other animal groups
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If last year, there were 80 lotus plants in a lake. Then, 16 new lotus plants were added through reproduction and the current population is 96 now. The birth rate of lotus plant is

Last year, in a rat population of 600 rats, 600 new rats were added through reproduction in the current year to make a total population of 1200 rats.
Find the birth rate of this rat population.

A solenoid with \(2\times 10^4\) turns per meter, diameter 0.1 m, has a coil of 100 turns and 0.01 m radius placed inside. If solenoid current decreases from 4 A to 0 in 0.05 s, total charge through coil is :