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Genetic drift occurs when a few indlviduals of a species colonize an island. This phenomenon is
(1) the bottleneck effect
(2) the founder effect
(3) assortative mating
(4) random mating

The struggle for existence is a consequence of
(1) each organism leaving more organisms than needed to replace itselt
(2) innate competitive tendencies
(3) the inevitable difficulty of coping with climatic conditions
(4) territories and dominance hierarchies

Darwin believed that a giraffe has a long neck because
(1) a creator designed it that way
(2) catastrophes eliminated short neck forms
(3) its ancestors stretched their necks to get food
(4) ancestral giraffes with longer necks got more food and left more surviving off-springs.

In a sympatric speciation, there is:
(1) geographical isolation between groups of population
(2) no geographical isolation between groups of population
(3) reproductive isolation of a subpopulation in the midst of the parent population
(4) geographical isolation bout no reproductive isolation

Which of the following types of natural selection reduces variation but does not change the mean value?
(1) directional
(2) stabilizing
(3) disruptive
(4) all of these

In genetic drift, the term "genetic bottleneck" means:
(1) reduction in allele frequencies or richness
(2) random change in allele frequency by chance alone
(3) sudden increase in the number of individuals
(4) reproductive isolation of the population

Which of the following is not a precondition for Hardy-Weinberg Equilibrium?
(1) The population should be large
(2) The mating should be assortative
(3) There is no gene flow into or out of the population
(4) All offspring should be equally fertile

Which of the following is not a major evolutionary trend seen in the evolution of horse?
(1) Progressive increase in the number of toes
(2) Increase in the complexity of the molar teeth
(3) Lengthening of the limbs in general
(4) Enlargement of the brain

The first genetic code of life was based on
(1) DNA
(2) RNA
(3) Proteing
(4) Lipids

Both Charles Daryin and A.R Wallace were influenced by the:
(1) writings of J.B.S.Haldane on the origin of life
(2) findings of Urey and Miller experiments
(3) findings on the Galapagos Islands
(4) essay on human population by T.R.Malthus

On heating (NH₄)₂Cr₂O₇ gas evolved is X. Same gas can be obtained by heating:
1) NH₄NO₂
2) NH₄NO₃
3) Mg₃N₂ + H₂0
4) Na₂0₂ + H₂0

Number of P-O-P bond in cyclic meta-phosphoric acid is 
1) 0
2) 2
3) 3
4) 4

Calcium carbide when heated with nitrogen gives: 
1) Ca₃N₂
2) Ca(CN)₂
3) CaCN₂
4) Ca(CNO)₂
 

Sodium Nitrate on heating with zinc dust and caustic soda gives: 
1) NaN0₂
2) NH₃
3) NO₂
4) N₂0

Non-combustible hydride is 
1) PH₃
2) AsH₃
3) SbH₃
4) NH₃

A magnet approaches a ring shown in the figure. What will be the direction of the current in the ring as seen from the side of magnet?

1. No current will flow
2. Clockwise
3. Anticlockwise
4. Can’t be determined

Calculate φ through the following surface as per the magnetic field given in the image below: (O is at center of co-ordinate system). Size of the edge is a in the given cube.

OAED, DEFG & AEFB
1) -2a², -3a² & 4a²
2) 2a², -3a² & 4a²
3) -2a², 3a² & 4a²
4) -2a², -3a² & -4a²

Calculate current flowing through R1 and R2 as given in the figure. The diameter of the circular ring is 2m and ring has zero resistance. Magnetic field is 1 Tesla and a conducting rod is kept along the diameter as shown. On one side of conducting rod, there is a resistor of resistance 1Ω and on the other side there is a resistor of resistance 2Ω.  The rod is rotating with ω = 10 radians / second.  Calculate current flowing through 2Ω resitor in Amperes. 

(1) 50 
(2) 75 
(3) 25
(4) 50/3

A current i is flowing through outer square loop of length L as shown in the figure below. There is a small square loop of length l kept at the center. Calculate coefficient of mutual Inductance, M. Assume L >> l. 

(1) 2√2 * μ₀ l²/L
(2) 2√2 * μ₀ l²/πL
(3) 2√2 * μ₀ l²ⁱ/πL
(4)None of the above

Given the circuit below: 
Calculate current through register R1 at
(a) t = 0
(b) t → ∞ (steady state)

(1) E/(R₁ + R₂), E/R2
(2) E/(R₁ + R₂), 0
3) E/R₁,  E/R₂
4) None of these