Life Processes Science - Life Processes

• A
  Pepsin.
• ✓
  Mucus.
• C
  Salivary amylase.
• D
  Bile.

Answer: B.

• A
  They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart.
• B
  They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body.
• C
  They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body.
• ✓
  They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body.

Answer: D.

• A
  $(i)$ and $(iii).$
• B
  $(ii)$ and $(iv).$
• ✓
  $(i)$ and $(iv).$
• D
  $(ii)$ and $(iii).$

Answer: C.

• A
  Absorption of light energy by chlorophyll.
• B
  Reduction of carbon dioxide to carbohydrates.
• ✓
  Oxidation of carbon to carbon dioxide.
• D
  Conversion of light energy to chemical energy.

Answer: C.

• A
  Glycogen.
• B
  Protein.
• ✓
  Starch.
• D
  Fatty acid.

Answer: C.