Fish and snake both have scales. How do these scales differ from each other?

What are two types of lyphocytes? How they do differ from each other?

How does solid state differe from the other two states?

At a stage of their cycle, ascomycetes fungi produce the fruiting bodies like apothecium, perithecium or cleistothecium. How are these three types of fruting bodies different from each other?

How do we get different forms of energy ?

How are the male and female gametophytes of pteridophytes and gymnosperms different from each other?

How do mammals differ from other groups of animals.

How are the bones in our body joined to each other?

Which type of force do like charges exert on each other?

Which type of force do unlike charges exert on each other?

In the homologous series, the successive members differ from each other in molecular formula by _____ group.