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Match List-I with List-II: List-I (Era) A. Mesozoic Era B. Proterozoic Era C. Cenozoic Era D. Paleozoic Era List-II (Dominant Life Forms) I. Lower invertebrates II. Fish & Amphibia III. Birds & Reptiles IV. Mammals
Mutations in plant cells can be induced by:
The angle of a prism is $A$. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence $2A$ on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index $\mu$ of the prism is:
Variations caused by mutation, as proposed by Hugo de Vries, are:
The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called:
Identify the fossil of a man who showed the following characteristics: (A) Brain capacity of 1400 cc (B) Used hides to protect their body (C) Buried their dead bodies
The idea of mutations was brought forth by:
Match the corresponding entries of Column 1 (Magnification, m) with Column 2 (Nature of Mirror/Image): **Column 1** (A) m = –2 (B) m = –1/2 (C) m = +2 (D) m = +1/2 **Column 2** (a) Convex mirror (b) Concave mirror (c) Real image (d) Virtual image
Match Column-I with Column-II.
Which of the following is not due to total internal reflection?
A car is negotiating a curved road of radius $R$. The road is banked at an angle $\theta$. The coefficient of friction between the tyre of the car and the road is $\mu_s$. The maximum safe velocity on this road is:
The given electrical network is equivalent to:
An astronomical refracting telescope will have large angular magnification and high angular resolution when it has an objective lens of:
Genetic drift operates in:
For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at terminal Y?
Identify 'X' in the following reaction.
The eye of the octopus and the eye of the cat show different patterns of structure, yet they perform a similar function. This is an example of:
Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
Thorn of Bougainvillea and tendril of Cucurbita are examples of:
A light ray falls on a glass surface of refractive index $\sqrt{3}$, at an angle of $60^{\circ}$. The angle between the refracted and reflected rays would be: