Topic 2 Plants: Primary vs Secondary Growth

Question 1

• Takes place via mitosis at meristems

Answer 1

Plant Growth

Question 2

• Vertical growth occurring at apical meristems (located at tips of roots and shoots)
• Occurs before secondary

Answer 2

Primary Growth

Question 3

• Root cap covers roots protecting the apical meristem.

Answer 3

Root Growth

Question 4

• Zone of division
• Zone of elongation
• Zone of maturation

Answer 4

Three zones of Root Tip

Question 5

• where apical meristem cells are located and divide

Answer 5

Zone of division

Question 6

• above apical meristem, cells absorb water and elongate

Answer 6

Zone of elongation

Question 7

• cells differentiate to specific plant tissues

Answer 7

Zone of maturation

Question 8

• Horizontal growth occurring at lateral meristems (vascular cambium and cork cambium)
• Only occurs in woody plants

Answer 8

Secondary Growth

Question 9

• Ring of meristematic tissue located between primary xylem (closer to center) and primary phloem (closer to outer edge)
• Cells produced inside of ring of vascular cambium become secondary xylem (forms wood along pith)
• Cells outside become secondary phloem (forms bark with cork and cork cambium)
• New xylem is produced every year (forming growth rings) whereas new phloem replaces old phloem

Answer 9

Vascular Cambium

Question 10

• Ring of meristematic tissue located outside phloem

- Produces cork, the outermost protective layer

Answer 10

Cork Cambium