Life Processes ...

Choose the correct answer from the alternatives given.
Blood flows through blood vessels because of:

The number of nephrons in a kidney is equal to 

Birds and mammals have:

Given is an animal followed by three terms or features. Choose the term which does not match with the animal.
Amoeba.

Plant X is a vascular and invasive plant species that grows densely over the surface of a lake at a very high rate, due to pollution in water. It has been linked to oxygen depletion of the water, in spite of the fact that it is photo-synthetic.
Which of the following accounts for this contradiction?

Succus entericus is the secretions of 
A. Villi
B. Crypts of Lieberkuhn

The water lost by transpiration is:

Which of the following cation is associated with high blood pressure?

People suffering from high blood pressure should take which of the following precautions to avoid an excessive rise in their blood pressure?

 Aquatic animals and plants are able to survive in water because