Immortal Animals

Assertion (A) : Cancer cells are virtually immortal until the body in which they reside dies. Reason (R) : Cancer is caused by damage to genes regulating the cell they division cycle.

(a) What is meant by aquatic animals and terrestiral animals ? (b) From where do the aquatic animals and terrestrial animals obtain oxygen for breathing and respiration ?

What are the following terms referred to as ? (i) Auroral animals (ii) Vesperal animals.

No individual is immortal then it is wondering that vast number of plant and animal species have existed on earth for several thousands of years. There must be some processes in living organisms that ensure this continuity. This process is called

Amoeba is called immortal and it is scattered all over the world due to

Amoeba is called immortal because it does not undergo natural death.

Assertion: ADA deficiency can not be cured permanently by gene therapy Reason :The genetically engineered lymphocytes are immortal only in culture conditions