Plants Flashcards
1
Q
How is water taken in by roots?
A
Osmosis.
Active transport of mineral ions in roots. Increase solute concentration in roots. Water moves from low to high solute conc.
2
Q
Which sugar does the phloem carry?
A
Sucrose
3
Q
Does Pfr (phytochrome) act as a promoter or inhibitor in long-day plants?
A
promoter
Enough Pfr left after short nights to initiate transcription of genes for flowering
4
Q
Does Pfr (phytochrome) act as a promoter or inhibitor in short-day plants?
A
inhibitor. All Pfr converted to Pr in long night so no Pfr left. Flowering occurs
5
Q
State the function of the tap and reservoir of potometer
A
reset the potometer
