(a) Describe the mechainsm of urine formation in human excretory sytem. Draw a labelled diagram to illustrate your answer.
(b) where is urine carried through ureters ?
(c) What is urethra ?

Why are the ceilings of concert halls made curved? Draw a labelled diagram to illustrate your answer.

What is an ammeter? How is it connected in a circuit? Draw a diagram to illustrate your answer.

Describe the following: (a) synapsis (b) bivalent (c) chiasmata Draw a diagram to illustrate your answer.

Describe the structure of human excertory system with suitable diagram. Add a note on the process of urine formation.

(a) Draw a neat and labelled diagram of human sperm. (b) What is menstrual cycle?

(a) Describe the process of nutrition in Amoeba. Draw labelled diagrams to show the various steps in the nutrition in Amoeba. (b) What is the mode of nutrition in Amoeba known as ? (c) What is the process of obtaining food by Amoeba called ? What does it mean ?

(a) Name the various organs of the human excrtory system (b) Draw a neat labelled diagram of the human excretory system (c) What is the function of excretory system in humans ?

(a)Draw a labelled diagram of internal structure of human heart. (b) What are chordae tendinae? Give their function.

In the accompanying diagram of urine formation, identify a, b, c and d

When and where do we see a rainbow? How is a rainbow formed? Draw a labelled diagram to illustrate the formation of a rainbow.