Explain the function of eardrum.

Explain the function of reservoir in a nutrient cycle. List the two types of nutrient cycles in nature.

Explain the function of barscreens in a wastewater treatment plant.

Draw a human brain, label the parts and explain the functions of each part .

Draw a labelled diagram of the sectional view of a mature pollen grain of angiosperms. Explain the function of generative cell and vegetative cell