Short Answer TypeA Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 pregeny?
Write a and b in the given flow chart of a neuron through which information travels as an electrical impulse.
If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it? Draw a labelled ray diagram to support your answer.
A compound ‘X’ on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound ‘Y’. ‘X’ also reacts with sodium metal to evolve a colourless gas ‘Z’. Identify ‘X’, ‘Y’ and ‘Z’. Write the equation of the chemical reaction of formation of ‘Y’ and also Write the role of sulphuric acid in the reaction.
State the laws of refraction of light. Explain the term ‘absolute refractive index of a medium’ and write an expression to relate it with the speed of light in vacuum.
What is meant by the power of a lens? Write its SI unit. A student uses a lens of focal length of 40 cm and another of –20 cm. Write the nature and power of each lens.
Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparatively better chances of survival - the one reproducing asexually or the one reproducing sexually ? Give a reason to justify your answer.
The difference between asexual and sexual reproduction is that in asexual reproduction only one parent is involved, whereas in the sexual mode of reproduction two parents are involved.
The organisms reproducing sexually have better chances of survival because it incorporates variations and promotes diversity of characters in an offspring due to combinations of genes and thus the offsprings are better adapted to the environment and therefore have better chances of survival.
Show how would you join three resistors, each of resistance 9Ω so that the equivalent resistance of the combination is (i) 13Ω (ii) 6Ω?
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