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Figure 2 shows xylem and phloem from the stem of a plant - Edexcel - GCSE Biology - Question 2 - 2022 - Paper 1
Question 2
Figure 2 shows xylem and phloem from the stem of a plant. (i) Living cells in phloem use energy to transport sucrose. Which organelles release energy in living cel... show full transcript
Worked Solution & Example Answer:Figure 2 shows xylem and phloem from the stem of a plant - Edexcel - GCSE Biology - Question 2 - 2022 - Paper 1
Step 1
Living cells in phloem use energy to transport sucrose. Which organelles release energy in living cells?
Answer
The organelles that release energy in living cells are mitochondria. They are known as the powerhouse of the cell and are responsible for generating ATP through cellular respiration.
Step 2
Describe two features of the structure of xylem vessels that can be seen in Figure 2.
Answer
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Structure: Xylem vessels are typically composed of dead cells that are arranged end-to-end forming long tubes. This design helps to efficiently transport water and minerals from the roots to the rest of the plant.
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Lignification: The walls of the xylem vessels are often lignified, providing structural support and preventing collapse under the negative pressure created during transpiration.