Structure of the Atom — Science STD 9 — Question

Which one of the following species of honey bee is an Italian species?

Which of these options are not a function of ribosomes?

1. It helps in manufacture of protein molecules.
2. It helps in manufacture of enzymes.
3. It helps in manufacture of hormones.
4. It helps in manufacture of starch molecules.

Name a physical quantity that remains constant in a uniform circular motion:

Parenchyma which contains chlorophyll is called:

Smallest possible unit of a compound which has independent existence is:

A body moving along a straight line at 20 metre per second undergoes an acceleration of 4 metre per second square. After 2 second it speed will be:

The atomic radius of hydrogen is in nanometers:

Alpha-particles that come closer to nuclei in Rutherford's alpha particle scattering experiment:

An object is thrown vertically upwards with a velocity u, the greatest height h to which it will rise before falling back is given by: