Cell - structure and functions — Science STD 8 — Question

How do hips of girls change during puberty?

Name the parent sheep of which Dolly was a clone.

Fill in the following blanks with suitable words:Migratory birds fly to faraway places because of____________changes.

If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?

Name the process of the fusion of gametes?

Name an antibiotic extracted from fungus (mould). Name the fungus.

Name one meat yielding animal and one egg yielding animal.

What do the chloroplasts contain?

Name the gas evolved when a metal reacts with water.

Large scale deforestation leads to the decrease in the amount of gas A in the atmosphere whereas the amount of gas B increases. The increased amount of gas B in the atmosphere causes an effect C which leads to excessive heating of the earth and its atmosphere producing an undesirable phenomenon D. What is A, B, C and D?