During early sea urchin development, which embryonic cells have similar organizer activity to that of amphibian Spemann organizer?

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Which of the following molecule possesses linear structure ?

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What is wrong about anode rays?

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When atoms of the gold sheet are bombarded by a beam of á -particles, only a few á-particles get deflected whereas most of them go straight undeflected. This is because

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Which of the following is not a characteristic of Planck’s quantum theory of radiations?

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Which of the following statements is wrong? The probability of finding the electron in px orbital is

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In uni electron system, the wave number of any spectral line is directly proportional to