Gravitation — Science STD 9 — Question

Epithelial tissue is found in:

What is the effect of pressure on gas:

The conversion of a solid into vapours without passing through the liquid state is called:

1. Vaporization.
2. Fusion.
3. Sublimation.
4. Freezing.

Which of the following is non-communicable disease?

1. Allergy.
2. Malaria.
3. Diarrhea.
4. Tuberculosis.

“Is malleable and ductile” best describes:

1. A solution.
2. A metal.
3. A compound.
4. A non-metal.

Living organisms vary widely in size. However, even the largest organisms such as the giant redwood and the blue whale have cells that are roughly the same size as those in smaller organisms. Why are all cells small?

While preparing a slide for observing onion peel under a microscope, the onion peel is immediately kept in a watch-glass containing a drop of water. Why this is done?

Which of the following statement best describe frequency?

Intercellular connections in plant cells are called:

1. Middle lamella.
2. Microfirils.
3. Matrix.
4. Plasmodesmata.

Which of the following statement is correct about the atom of and element?

1. An atom can have only protons and neutrons but no electrons.
2. An atom can have only electrons ad neutrons but no protons.
3. An atom can have only electron and proton but o neutron.
4. an atom must always have a proton, neutron and electron.