Two examples of fishes are given.
- Scoliodon (Dogfish)
- Exocoetus (Flying fish).
a) Place them in two distinct classes.
b) Differentiate the above classes on the basis of two important characters.

Figure A and B are the fishes oftwo different classes. Identify and differentiate between these classes.

Figures (X) and (Y) are the fish of two different classes. Identify them and differentiate between these classes, X, Y.

How are vitamins classified ? Give two example for each class.

From a fish market, you got a fish, on a close watching your friend says it is a cartilaginous fish. a) Which characters helped him to identify it as a cartilaginous fish. (any four characters.) b) Name the class it belongs.

A rope of length 40 metres is cut into two pieces and two squares are made on the floor with them. The sum of the. area enclosed is 58 square meter. a) If the length of one piecce is taken as 'x', what is the. length of the other piece. b) What are the lengths of the sides of the squares? c) Write the. given fact about area as an algebraic equation. d) What is the length of each piece?

Different types of fungi are given. a) Clasiffy them into their specific classes. Groups Phycomycetes Ascomycetes Basidlomycetes Deuteromycetes b) Write the distinguishing characters of ascomycetes and basidiomycetes.