B6 - Transpiration And Translocation Flashcards
Where does translocation occur?
In the phloem
The phloem consists of :
Sieve tube elements and companion cells
Cells in the phloem are:
Alive
Why is translocation important in plants?
Without it, products of photosynthesis wouldn’t be able to reach other parts of the plant, which means respiration would not occur.
What is the role of companion cells?
Actively pump sucrose in or out of the sieve cells
Which piece of equipment is used to investigate transpiration?
Potometer
The movement of water from the roots, through the xylem and out of the leaves is called _____
The transpiration stream
Transpiration is caused by?
The evaporation and diffusion of water from a plant’s surface
Which of the following will decrease the rate of transpiration?
High humidity
True or False: Transport in the xylem is in both directions?
False
Water loss from the plant is controlled by
The opening and closing of the stomata
Which of the following indicates the pathway of water through a plant?
Root hair cell —> xylem —> mesophyll —> air space —> stomata
True or false: xylem cells are living?
False
The xylem transports
Water
Where does water leave the leaf
The stomata
