Name two types of speciation.

Name two types of respiratory muscles in frog.

What is variation ? Name two types of variations . What is the condition for two quantities to be in inverse variation .

Name the two types of selection.

Name two types of masses.

Name two types of cells.

Name two types of food chain.

Name two types of diseases on the basis of their occurrence.

Define speciation.

Name two types of gametogenesis.

Name two types of spindle fibres.