Sketch the cross section of soil and label the various layers.

Draw the diagram of cross section of a leaf and label the following parts : (a) chloroplast (b) cuticle

Draw a diagram of the human excretory system and label the various parts

Draw a diagram of cross - section of the human heart and label the following parts : (i) Right ventricle (ii) Aorta (iii) Left atrium (iv) Pulmonary arteries.

Explain the transverse section of young anther with a labelled diagram.

Draw the diagram of a microsporangium and label its wall layers. Write briefly on the role of the endothecium.

Given below is a diagrammatic sketch of a portion ofhuman male reproductive system. Select the correct set of the names of the parts labelled A,B,C,D:-

Draw the diagram showing longitudinal section of a flower and label the part where pollination takes place