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Draw a diagram of a section through a leaf - Leaving Cert Biology - Question b - 2007
Question b
Draw a diagram of a section through a leaf. Label a stoma and a guard cell. Give a function of the guard cell. Name two gases that enter or leave the leaf. Name t... show full transcript
Worked Solution & Example Answer:Draw a diagram of a section through a leaf - Leaving Cert Biology - Question b - 2007
Step 1
Draw a diagram of a section through a leaf. Label a stoma and a guard cell.
Answer
To create a diagram of a section through a leaf, follow these steps:
- Draw the outline of the leaf to represent its shape.
- Add the epidermis on both the upper and lower sides of the leaf, indicating the protective layer.
- Draw the stoma as a small opening on the underside of the leaf, which facilitates gas exchange.
- Include the guard cell that surrounds the stoma, showing its typical bean shape.
- Label the parts: clearly denote the stoma and the guard cell.
- Add air spaces inside the leaf to represent the interior structure where gas exchange occurs.
Step 2
Give a function of the guard cell.
Answer
The guard cell controls the size of the stoma, allowing it to regulate the passage of gases and water vapor into and out of the leaf. By opening or closing the stoma, guard cells help in maintaining the plant's water balance and facilitating photosynthesis.
Step 3
Step 4