Q1. Assertion: Photosynthesis occurs in the chloroplast of plant cells.
Reason: Chloroplast contains chlorophyll which absorbs sunlight.

Q2. Assertion: The human heart has four chambers.
Reason: Two atria and two ventricles are present to separate oxygenated and deoxygenated blood.

Q3. Assertion: Amoeba reproduces by binary fission.
Reason: Amoeba is unicellular and divides to form two identical cells.

Q4. Assertion: Red blood cells are nucleated.
Reason: RBCs carry oxygen in the blood.

Q5. Assertion: The human excretory system includes kidneys.
Reason: Kidneys filter waste and maintain water balance.

Q6. Assertion: Vaccines help prevent diseases.
Reason: They stimulate the production of antibodies in the body.

Q7. Assertion: DNA is the genetic material in humans.
Reason: DNA stores and transmits hereditary information.

Q8. Assertion: In plants, xylem transports water.
Reason: Xylem vessels have thick walls and lignin for water conduction.

Q9. Assertion: Lungs are the main organs of respiration.
Reason: Lungs have alveoli which facilitate gas exchange.

Q10. Assertion: Fertilization in humans occurs in the fallopian tube.
Reason: Sperm meets egg immediately after ovulation in the tube.