What are the modifications that are observed in birds that help them fly?

What are the changes that can be observed with the iron rod and the colour of copper sulphate solution?

What phenomenon can be observed in a tuned circuit?

What are transgenic animals? What are the needs to produce them?

Archaebacteria, special type of bacteria, which are able to survive in extreme conditions what is the feature helping them for this ?

What modification has to be made in the galva nometer if he still wants to use the galvanometer in place of the ammeter?