What are gnathostomata? Write the classes.

What are interhalogen compounds? Write any two examples.

what are enzymes? Write in brief the mechanism of enzyme catalysis.

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

In a class there are 17 boys and 13 girls . In another class there are 15 boys and 12 girls. What is the probability of selecting a girl from all students from both the classes.

List features of class aves'

Sea star belongs to the class