Photo AI
3 (a) Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Biology - Question 3 - 2012 - Paper 1
Question 3
3 (a) Complete the sentence by putting a cross (X) in the box next to your answer. Plants lose water, into the air, by a process called ☐ A active transport ☐ B fer... show full transcript
Worked Solution & Example Answer:3 (a) Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Biology - Question 3 - 2012 - Paper 1
Step 1
Step 2
Step 3
Describe the effect of temperature on water loss from this plant during the investigation.
Answer
As the temperature increases, the rate of water loss from the plant also increases. This is evident as the maximum water loss was observed at 35°C, where it reached 122 g. Beyond this temperature, the water loss slightly decreased at 45°C, indicating a peak at 35°C for optimal transpiration.
Step 4
Suggest why the plastic bag was placed around the plant pot during this investigation.
Answer
The plastic bag was likely used to prevent evaporation of water from the soil and to maintain humidity around the plant, ensuring that the measured water loss was predominantly through transpiration rather than from soil evaporation.
Step 5
Explain how glucose production could be affected if this plant lost a lot of water.
Answer
If the plant loses a significant amount of water, it may experience reduced turgor pressure, which can hinder its ability to transport nutrients and photosynthesize efficiently. In such a state, the production of glucose could decrease due to inhibited photosynthesis, as stomatal closure to conserve water also limits CO2 intake.
Step 6
Describe the process that moves water from the soil into the plant.
Answer
The process that moves water from the soil into the plant is known as osmosis. Water molecules move through the plant's roots from an area of higher water concentration in the soil to an area of lower water concentration inside the plant's root cells, allowing the plant to absorb necessary moisture for various physiological processes.