OCR A Level Biology B (Advancing Biology)
OCR A Level Biology B (Advancing Biology) Water and its Importance in Plants and Animals Exam Questions
Free OCR A Level Biology B (Advancing Biology) exam questions on Water and its Importance in Plants and Animals, with mark schemes. Covers water structure, hydrogen bonding and the properties that make water essential.
Water and its Importance in Plants and Animals exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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A Level Biology Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About OCR A Level Biology B (Advancing Biology) Water and its Importance in Plants and Animals
This topic covers why water matters to life.
What you need to know
- Structure Polar molecule with hydrogen bonding.
- Thermal properties High specific heat capacity and latent heat of vaporisation.
- Solvent Transport of solutes in blood and xylem.
- Cohesion Supports water columns in xylem and surface tension.
Common mistakes in Water and its Importance in Plants and Animals
- Saying hydrogen bonds are within a water molecule.
- Forgetting ice is less dense than water.
- Confusing cohesion and adhesion.
Try three Water and its Importance in Plants and Animals exam-style questions
1. Explain why water is a good coolant. (2 marks)
Show the mark scheme answer
High latent heat of vaporisation (1), so evaporation of sweat removes a lot of heat (1).
2. Explain why ice floats. (1 mark)
Show the mark scheme answer
Hydrogen bonds hold molecules further apart, making ice less dense.
3. State why water is polar. (1 mark)
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Oxygen is more electronegative, giving uneven charge distribution.
Water and its Importance in Plants and Animals FAQs
What does this topic cover?
The properties of water and their biological importance.
Why does water have a high boiling point?
Many hydrogen bonds must be broken.
How does water help aquatic life in winter?
Ice insulates the water below.
Revise this topic with flashcards: A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
