Who showed that viruses are smaller than bacteria?

Give one evidence to show that viruses are smaller than bacteria.

Who first showed that viruses could be crystallised?

Who showed that the atomic number of an element is a more fundamental property than its atomic mass and when?

Fill in the blanks The radius of nucleus is smaller than the radius of an atom by a ____

We wish to obtain an erect image of an object, using a concave mirror of focal length 15cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

Form the equation from the folllowing: The sum of the digit number is 12 . If the position of thee two digitss are interchanged, th number so formed is smaller than the original number by 18 . Find the number.

Who showed that the green parts in plants only make glucose?

Who discovered viroids?