The diagram shows two vessels found in the stems of plants - Edexcel - GCSE Biology - Question 5 - 2013 - Paper 1
Question 5
The diagram shows two vessels found in the stems of plants.
(a) (i) Name the vessel that transports water and mineral ions through the plant.
(ii) Energy is needed... show full transcript
Worked Solution & Example Answer:The diagram shows two vessels found in the stems of plants - Edexcel - GCSE Biology - Question 5 - 2013 - Paper 1
Step 1
Name the vessel that transports water and mineral ions through the plant.
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Answer
The vessel that transports water and mineral ions through the plant is called the xylem.
Step 2
Which cell component supplies energy that can be used for the transport of sugars through the plant?
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Answer
The cell component that supplies energy for the transport of sugars is B mitochondria.
Step 3
Suggest why the percentage of blood going to each of the body parts changes when a person exercises.
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Answer
During exercise, the body prioritizes blood flow to the muscles to support increased activity and energy demand, while reducing blood flow to non-essential areas such as the brain and liver. This is crucial for enhancing performance and stamina.
Step 4
State a disadvantage of anaerobic respiration.
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Answer
A disadvantage of anaerobic respiration is that it results in the production of lactic acid, which can lead to muscle fatigue and discomfort.
Step 5
Describe how the circulatory system transports substances around the body.
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The circulatory system transports substances through a network of blood vessels. The heart pumps oxygenated blood from the lungs to various body tissues via arteries. In tissues, oxygen and nutrients are exchanged for carbon dioxide and waste products. Deoxygenated blood returns to the heart via veins, where it is then pumped to the lungs for re-oxygenation. This system ensures that all body cells receive essential substances for metabolism and function.
