BIO1 - Cells, Exchange and Transport - Transport in Plants
OCR AS Biology specification, cells, exchange and transport exam.
- Created by: RhysWall
- Created on: 05-01-12 19:53
Other questions in this quiz
2. Xylem are adapted to their function because... (select the incorrect answer)
- Pits allow lateral movement so water can move into other xylem tubes to bypass a blockage or move into surrounding tissue
- The have a waxy cuticle on the walls of the xylem to stop it from being too leaky
- They are made of dead cells aligned in a continous column
- The tubes are narrow, allowing lots of adhesion to the xylem wall (capillary action is successful)
3. What does lignin do to a xylem cell?
- Widens the plasmodesmata allowing more assimilates to be transported by the xylem
- Provides a waterproof layer effectively killing the cell allowing it to form a xylem vessel
- Adds nutrients to the xylem cell allowing it to grow faster
- Lignin has no effect
4. When using a potometer, precautions must be taken. Two of these are...
- Make sure thed door is shut to prevent wind and turn the radiator off
- Ensure leaves are dry and set up equipment under water
- Use vaseline, ensure leaves are wet
- Make sure it
5. Which invertebrate is associated with supporting the theory of translocation?
- Whale
- Aphid
- Ladybird
- Snail
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