Section A: Diagram Based Questions
- Circulation Path: Trace the path of a drop of blood starting from the Vena Cava and
ending at the Aorta. Mention all chambers and blood vessels it passes through.
- Nephron Function: In the structure of a nephron:
(a) Where does filtration flow take place?
(b) Where does selective reabsorption of glucose and amino acids occur?
(c) Where is urine largely collected?
- Digestive Track: Name the organs A, B, C, D in the digestive system if:
A: Produces bile.
B: Secretes trypsin.
C: Absorbs water.
D: Acidic mixing of food.
- Draw a schematic representation of Transport of oxygen and Carbon dioxide in humans. (Double
Circulation Schematic).
- Draw a diagram of an open and closed stomatal pore. Label 'Guard Cells' and 'Chloroplasts'.
Section B: Scientific Reasoning
- Why do the walls of the Ventricles need to be thicker than the walls of the Atria?
- Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like
humans?
- Why does the rate of photosynthesis decrease if the stomata get blocked by dust?
- Why is it advised to breathe through the nose and not through the mouth? (Role of hair/mucus).
- Why does the blood pressure drop in capillaries? (Surface area logic).
- Why do plants have low energy needs compared to animals?
- Explain why the translocation of food materials in plants requires energy, whereas transport of
water does not.
- Why is the separation of the right side and left side of the heart useful? (High energy needs of
birds/mammals).
Section C: Differentiate & Compare
- Differentiate between Inhalation and Exhalation mechanisms (Diaphragm movement / Rib cage movement /
Volume / Pressure).
- Distinguish between Blood and Lymph. (Color, Components, Direction of flow).
- Compare Single Circulation (Fish) vs Double Circulation (Humans).
- Differentiate between Pepsin and Trypsin. (Site of action, Medium requirement).
- Differentiate between 'Assimilation' and 'Egestion'.
