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What is the principle that countries should produce goods they can create most efficiently and trade for others?

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Important Questions on Wave Optics

EASY
Physics>Optics>Wave Optics>Huygen's Principle
Which one of the following represents a palindromic sequence in DNA?
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Physics>Optics>Wave Optics>Huygen's Principle
Which of the following represents the order of 'Horse'?
MEDIUM
Physics>Optics>Wave Optics>Huygen's Principle
Organic compounds first evolved in earth required for origin of life were :
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Physics>Optics>Wave Optics>Huygen's Principle
Mention one example each from plants and animals exhibiting divergent evolution.
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Physics>Optics>Wave Optics>Huygen's Principle
Define the term wavefront. Using Huygen's wave theory, verify the law of reflection.
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Physics>Optics>Wave Optics>Huygen's Principle
Select the analogous structure (s) from the list given below.
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Physics>Optics>Wave Optics>Huygen's Principle
Which one of the following are analogous structures?
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Physics>Optics>Wave Optics>Huygen's Principle
Genetic drift
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Physics>Optics>Wave Optics>Huygen's Principle
Define wavefront of a travelling wave. Using Huygens principle, obtain the law of refraction at a plane interface when light passes from a denser to rarer medium.
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Physics>Optics>Wave Optics>Huygen's Principle
Analogous structures are a result of:
MEDIUM
Physics>Optics>Wave Optics>Huygen's Principle
Wings of birds and wings of butterflies contribute to locomotion. Explain the type of evolution such organs are a result of.
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Physics>Optics>Wave Optics>Huygen's Principle
Variations caused by mutation, as proposed by Hugo de Vries, are:
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Physics>Optics>Wave Optics>Huygen's Principle
Industrial melanism is an example of:
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Physics>Optics>Wave Optics>Huygen's Principle
Differentiate between analogous and homologous structures.
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Physics>Optics>Wave Optics>Huygen's Principle
A population will not exist in Hardy-Weinberg equilibrium if:
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Physics>Optics>Wave Optics>Huygen's Principle
With the help of an algebraic equation, how did Hardy-Weinberg explain that in a given population the frequency of occurrence of alleles of a gene is supposed to remain the same through generations?
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Physics>Optics>Wave Optics>Huygen's Principle
The wings of a bird and the wings of an insect are:
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Physics>Optics>Wave Optics>Huygen's Principle
Define the term "refractive index" of a medium. Verify Snell's law of refraction when a plane wavefront is propagating from a denser to a rarer medium.
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Physics>Optics>Wave Optics>Huygen's Principle
A segment of DNA molecule comprises of 546 nucleotides. How many cytosine nucleotides would be present in it if the number of adenine nucleotides is 96 ?
MEDIUM
Physics>Optics>Wave Optics>Huygen's Principle
Direction In each of the following questions, a statement of Assertion (A) is given followed by corresponding statement of Reason (R). Of the statements, mark the correct answer as
Assertion (A): Maintenance of sterile environment is essential for manufacture of biotechnological products.
Reason (R): This is to enable growth of only desired products.