11.

Give the biological/technical terns for the following:

A constituent which causes pollution.

Give the biological/technical terms for the following:

The onset of menstruation in a young girl.

Give the biological/technical terms for the following:

Structure which connects the placenta with the foetus

Give the biological/technical terms for the following:

The fluid present between the layers of meninges

Give the biological/technical terms for the following:
Permanently open structures seen on the bark of an old woody stem.

Give the biological/technical terms for the following:

The biological process which is the starting point of the food chain

The change in an organism resulting due to stimulus

Give the biological/technical terms for the following:

 A solution in which the relative concentration of water molecules and the solute on either side of the cell membrane is the same. 

Choose the correct answer from the four options given below:

The cell component visible only during cell division is

• Mitochondria

• Chloroplast

• Chromosome

• Chromosome

Choose the correct answer from the four options given below:

Pulse wave is mainly caused by the

• Systole of atria

• Diastole of atria

• Systole of the left ventricle

• Systole of the left ventricle