Chapter+10

=**Comparing Stem Structure P111**=

Question 1:

 * This is a tissue diagram
 * Structures named are not cell organelles but types of tissue.

Question 2:
.
 * Both have a surrounding epidermal tissue
 * Both have vascular bundles
 * Both have a cortex tissue
 * Both have xylem and phloem

Question 3:
Phloem is positioned outside the xylem relative to the stem epidermis.

Question 4:
Monocots do not possess a cambium in between the phloem and xylem. The cambium is a lateral meristem, which creates secondary xylem growth adding to the thickness of the wood of the stem

******p. 112: Plan Diagrams of Leaves******
2. (a) Leaves growing in the shade would need to increase their ability to capture light, therefore they would have more chloroplast-containing palisade cells. Therefore the shade leaf is the lower one. 2 (b) Leaves need to be able to capture sunlight whatever their location, therefore they need a similar structure. The amount of sunlight will affect how much of each type of tissue they develop. =Renner's experiment p120=

Question 1:
The rate of water uptake decreases 17 cm3/hr to 0.

Question 2 :
Cutting the top of the shoot resulted in a decrease from 10 cm3/hr to 4 cm3/hr.

Question 3:
10 cm3/hr - 5cm3/hr = 5cm3/hr

Question 4:
The pressure generated in the xylem by the leaves on the shoot resulted in a greater uptake of water than that of the vacuum (18cm3/hr vs 5 cm3/hr).