You are provided with two fishes Catla (Bony fish) and Shark (Cartilagenous fish). Prepare a table showing difference in:
a) Position of mouth b) Air bladder.
c) Scales d) Fertilization

You are provided with two organic compounds'A and 'B' having the molecular formula 'C_4 H_6', which are position isomers of each other. Your are also supplied with ammoniacal solution of cuprous chloride. How will you identify 'A' and 'B ?'

Which is a true fish? a. Cat fish . b. Jelly fish c. Cuttle fish d. Silver fish

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

Which of the following is not a merit of Mendeleev's original periodic table? a) Prediction of undiscovered elements and their properties b) Correction of atomic masses of a few elements c) Systematic arrangement of elements based on atomic mass d) Similar elements were placed in different groups e) Separate positions are given for isotopes f) Order of increasing atomic weight is not observed. The correct code is

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

In which of the following radial symmetry is not found? a. Hydra. b. Ascaris c. Sea anemone d. Jelly fish

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.