transport in plants Flashcards
1
Q
what does the xylem transport
A
water and minerals
2
Q
what does the phloem transport
A
water and sugars
3
Q
how do plants generate positive pressure
A
osmosis/differences in concentration
4
Q
how do plants generate negative pressure
A
transpiration/evaporation
5
Q
symplastic and ___ routes end at the ___
A
transmembrane, vasculature
6
Q
the ___ route ends at the endodermis
A
apoplastic
7
Q
solute potential is ALWAYS ___
A
negative
8
Q
what values can pressure potential have
A
- positive
- zero
- negative
9
Q
reverse osmosis
A
pressure is added to remove contaminants/solutes from water
10
Q
what is the sink in summer
A
roots
11
Q
what is the sink in winter
A
leaves
12
Q
sieve cell
A
- sugar conducting
- lacks nucleus and other major organelles
- metabolically INACTIVE
13
Q
companion cell
A
- sugar loading/unloading cell
- has nucleus and major organelles
- metabolically ACTIVE
14
Q
examples of metabolically active sinks
A
growing leaves and roots
15
Q
examples of storage sinks
A
bulbs and root tubers
