How do Organisms Reproduce? — Science STD 10 — Question

Which one of these circumstances enables a concave mirror to be used as a shaving mirror?

What is the name of the opening in the human body through which undigested food is thrown out?

The following questions are about the nuclear reactor of a power plant.
Which isotope of uranium produces the energy in the fuel rods?

Name the three allotropic forms of carbon.

How do leaves of plants help in excretion?

Name a mirror that can give an erect and enlarged image of an object.

Name one hormone secreted by the pituitary gland.

What would be the colour of litmus in a solution of sodium carbonate?

Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.

How does copper-T prevent pregnancy?