Define natural aging of lakes.

Aging of leaves.

Define natural parthanogenesis. Explain its types.

A phenomenon of rapidly aging lake due to pollutants from Anthropogenic activities is _______.

Define the nature of uterus.

Define natural vegetative reproduction.

Define a relation R on the set N of natural numbers by R= {(x, y): y= x+5, x is a natural number less than 4, x, y in N). Depict this relationship using roster form. Write down the domain and the range.

Write the importance of lakes.

Define lactational amenorrhoea. Explain it as natural birth control method.

Define the unit of resistance ? (or) Define one ohm.