With the help of a suitable diagram describe the structure of humanspermatozoan.

With the help of a labelled diagram describe the structure of lungs.

With the help of illustrated diagrams describe the structure of an anatropous ovule.

With the help of suitable diagram describe the logistic population growth curve.

With the help of suitable diagram describe the logistic population growth curve.

With the help of a labelled diagram, explain the structure of eye and explain the function of its various parts.

Withthe help of a suitable diagram, explain the construction, working and theory of cyclotron.