Eduqas A Level Biology
Eduqas A Level Biology Adaptations for Transport Exam Questions
Free Eduqas A Level Biology exam questions on Adaptations for Transport, with mark schemes. Covers circulatory systems, the heart, blood vessels, haemoglobin and transport in plants.
Adaptations for Transport exam questions
2 question packs of real past exam questions with their mark schemes. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
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 Eduqas A Level Biology Adaptations for Transport
This topic covers transport in animals and plants. Expect cardiac cycle, oxygen dissociation curve and transpiration questions.
What you need to know
- Circulatory systems Open and closed, single and double circulation.
- Heart and vessels Cardiac cycle, control by the SAN and AVN, and structure of arteries, veins and capillaries.
- Haemoglobin Oxygen dissociation curves and the Bohr effect.
- Plant transport Water moves through xylem by cohesion-tension; transpiration and the potometer; translocation in phloem by mass flow.
Common mistakes in Adaptations for Transport
- Misreading the Bohr shift direction.
- Saying phloem carries water up the plant.
- Confusing tissue fluid formation with blood leaving vessels by osmosis.
Try three Adaptations for Transport exam-style questions
1. Explain the Bohr effect. (3 marks)
Show the mark scheme answer
Higher carbon dioxide concentration lowers pH (1), reducing haemoglobin's affinity for oxygen (1), so more oxygen is released to respiring tissues (1).
2. Explain how water moves up the xylem. (3 marks)
Show the mark scheme answer
Water evaporates from leaves (1); cohesion between water molecules (1) pulls a continuous column up the xylem under tension (1).
3. Explain why mammals have a double circulation. (2 marks)
Show the mark scheme answer
Blood returns to the heart after the lungs (1), so it can be pumped at high pressure to the body (1).
Adaptations for Transport FAQs
What does Adaptations for Transport cover?
Animal circulation, the heart, blood vessels, haemoglobin and plant transport.
Which practical links here?
Using a potometer to investigate transpiration rate.
What is the mass flow hypothesis?
Sugars move in phloem from sources to sinks due to a hydrostatic pressure gradient.
Revise this topic with flashcards: A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
