P-2 Life Processes in Living Organisms Part – 1 — Science STD 10 — Question

Why is graphite used for making dry cell electrodes but diamond is not?

Which one term in the following includes the other three?
Thyroid, ductless gland, thymus, pituitary, ovary.

List three sources of magnetic fields.

Two similar green plants are kept separately in oxygen free containers, one in dark and the other in continuous light. Which one will live longer? Give reasons.

What is the nature of a lens having a power of +0.5D?

Give three examples of reflex actions.

The scientist who classified elements on the basis of atomic number.

What is meant by regeneration? Name two animals which can regenerate fully from their cut body parts.

Name one method of contraception which also protects against sexually transmitted diseases.

Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?