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What is meant by the term diffusion? Diffusion is the process by which molecules or particles spread from an area of higher concentration to an area of lower concentration, due to their random movement - AQA - GCSE Biology - Question 2 - 2020 - Paper 1
Question 2
What is meant by the term diffusion? Diffusion is the process by which molecules or particles spread from an area of higher concentration to an area of lower concen... show full transcript
Worked Solution & Example Answer:What is meant by the term diffusion? Diffusion is the process by which molecules or particles spread from an area of higher concentration to an area of lower concentration, due to their random movement - AQA - GCSE Biology - Question 2 - 2020 - Paper 1
Step 1
What is meant by the term diffusion?
Answer
Diffusion is defined as the movement or spreading out of molecules or particles from an area of higher concentration to an area of lower concentration. This process occurs due to the random motion of the particles, which results in an equal distribution over time.
Step 2
Which two changes will increase the rate at which carbon dioxide diffuses into the mesophyll cells?
Answer
The two changes that will increase the rate of diffusion of carbon dioxide into the mesophyll cells are:
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Increased carbon dioxide concentration in the air: Higher concentrations of carbon dioxide in the surroundings will create a greater concentration gradient, facilitating faster diffusion into the mesophyll cells.
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Increased number of stomata that are open: More open stomata allow for more frequent entry of carbon dioxide, thereby enhancing its diffusion into the leaf cells.