Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
sieve elements contain ______ end walls or sieve plates
|
perforated
|
|
|
the sieve element are joined ____-__-_____ to form ______.
|
end to end
|
|
|
mature sieve element contain no _________ and ____ _________.
|
nucleus, few organelles
|
|
|
each sieve element has a _________ ___ with a ______, dense _________ and many _________.
|
companion cell, nucleas, dense cytoplasm, many mitochondria.
|
|
|
desccribe sieve elements
|
sieve elements contain perforated end walls or sieve plates
they have no nucleus and few organelles |
|
|
desccribe the structure of the sieve elements
|
they join end to end to form sieve tubes
they also have a companion edll with a nusleus, dense cytoplasm and many mitochondria |
|
|
explain the function of the phloem
|
transports organic molecules to or from the root, helps in translocation
|
|
|
structure of phloem??
|
consists of living cells including sieve elements and companion cells
|
|
|
uptake of water and ions is mainly by the _____ _____ which provide a large ______ _______ for the ________ of ____ and ____
|
- root hair
- surface area - absorbtion - water - ions |
|
|
ions are _______ into the ____ by _______ and ______ _______.
|
- absorbed
- root - osmosis - active transport |
|
|
water uptake by _____ along a _____ _______ _______ - soil water has a higher water potential (less ____)
|
- osmosis
- water potential gradient - negative |
|
|
the water potential gradient is __________ by water continually _____ __ the ______ and by ________ ____ in the ______ ____
|
- maintained
- moving up - xylem - dissolved ions - xylem sap |
