Which of the following micro-organism causes diseases like polio and chicken pox?
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Presence of large amounts of nutrients in waters also causes excessive growth of _________ algae.
In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?
Pulitzer prize is given in the field of ______.
Who was the first Governor General of Bengal?
In India, the Black Revolution is associated with self dependence in the production of ___________.
_________ is a natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, especially near the northern or southern magnetic pole.
______ is the perpendicular distance between point of application of force and axis of rotation.