Practice 2.2 Water with authentic IB Biology exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like cell biology, genetics, and ecology. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Outline how the properties of water make it an effective coolant for the body.
Describe how changes in weather conditions affect the transport and loss of water in plants.
Explain how water balance is restored in mammals when they are dehydrated.
Which of the following conditions is essential for the germination of seeds in most flowering plants?
Living organisms produce a wide variety of organic compounds.
Define the term organic.
State the three most commonly occurring elements.
Some organic compounds contain other elements. State one substance, or group of substances, that contains nitrogen.
Some organic compounds contain other elements. State one substance, or group of substances, that contains phosphorus.
What is a consequence of the specific heat capacity for liquid water, ice and water vapour?
| State | Specific heat capacity |
|---|---|
| liquid water | 4.187 |
| ice | 2.108 |
| water vapour | 1.996 |
What are the most frequently occurring elements in living organisms?
What is a difference between cohesion and adhesion?
What does the value in thin layer chromatography represent?
What is the term for the attraction of water molecules to other water molecules?
Outline the bonding between DNA nucleotides.
Explain how chemical bonding between water molecules makes water a valuable coolant in living organisms.
Describe the movement of water across membranes.
State the role of water in photosynthesis.
Describe the properties of water that make it a useful component of blood.
Explain the relationship between structure and function of arteries, capillaries and veins.
Outline how leucocytes defend the body against pathogens.