Heredity and Evolution — Science STD 10 — Question

Fill in the following blanks with suitable words:
The reciprocal of the focal length in metres gives you the _____________ of the lens, which is measured in _____________.

Fill in the following blanks with suitable words:
Carbon compounds have usually ________ melting points and boiling points because they are _______ in nature.

Fill in the following blanks with suitable words:
A series of organisms, each of which feeds on the next organism, the beginning of which is a green plant, is called a _____________.

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The addition of oxygen to a substance is called __________ whereas removal of oxygen is called __________.

When a ray of light goes from air into a clear material, you see the ray bend. How much the ray bends is determined by the ___________ of the material.

A human gamete contains________ chromosomes whereas a normal body cell has _________ chromosomes in it.

Khadins are common in ______.

The first member of alkyne homologous series is ___________.

Our ________system allows Us to react to our surroundings. Information from receptors passes along ________neurons to our brain. Our brain sends impulses along _______neurons to our muscles.