Differentiate between two different types of pyramids of biomass with the help of one exmaple of each.

Explain the mechanism of sex-determination in humans. b) Differentiate between male heterogamety and female heterogamety with the help of an example of each.

What does an Ecological Pyramid indicate ? Explain the three different types of upright Pyramids in nature with help of an example each.

Differentiate between multiple allelism and pleiotropy with the help of an example each.

Differentiate between two types of absorption of minerals in plants from soil.

We differentiate between voices of two different persons without seeing them by ………. of sound produced ?

Draw a 'pyramid of numbers' of a situation where a large population of insects feed upon a very big tree. The insects in turn, are eaten by small birds which in turn are fed upon by big birds. (b) Differentiate giving reason, between the pyramid of biomass of the above situation and the pyramid of numbers that you have drawn.

How would you differentiate between aggregate fruits and composite fruits ? Give one example of each.