F5: Chap 1

Question 1

Zone of Cell Division

Answer 1

• take place at apical meristems
• actively dividing meristems through MITOSIS
• when new cells are forming, the previously formed cell are pushed to the elongation zone

Question 2

Zone of cell elongation

Answer 2

• consist of cell that are increasing in size
• increase in size happens through osmosis and absorption of nutrients stored in vacuoles
• small vacuoles fuse together to form large vacuole (vacuolation)
• diffused water exerts pressure againts cell walls which pushes, widen and elongates the cell

Question 3

Zone of cell differentiation

Answer 3

• consistst of differentiating cell that differentiates once they reached maximum size
• cells differentiate to form permanent tissues such as cortex and phloem
• cells change their structure to become specialised cells that perform specific function
• exf Epidermal cell ~~~> guard cell

Question 4

Primary growth definition

Answer 4

Growth that occurs after germination and takes place in all parts of plant to elongate their stems and roots

Question 5

secondary growth def

Answer 5

occurs mainly in eudicots and small number of eudicots (shrub) to increase the circumference or diameter of plant stem and root.

Question 6

Difference between Primary and Sexondary growth

Answer 6

P: Do not have woody tissues
S: Have woody tissues

P: Thin bark
S: Thick bark

P: Absence of annual growth ring
S: Presence of snnuak growth ring

P: Epidermis, Cortex, Primary Vascular tissues

S: Bark Periderm, Secondary vascular tissues