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

What are the two types of leaves ?

What are the two types of reproduction ?

What are different types of systems?

What are different types of vaccines?

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

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

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?

What are different types of Energy?

What are different types of Energy?

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