Shoot Apex

Question 1

the stem segments between nodes

Answer 1

internodes

Question 2

a structure that has the potential to form a lateral shoot or branch

Answer 2

axillary bud

Question 3

is located near the shoot tip and causes elongation of a young shoot

Answer 3

apical bud

Question 4

helps to maintain dormancy in most non apical buds

Answer 4

apical dominance

Question 5

are structure that permit the passage of gas in work and outward

Answer 5

lenticels

Question 6

are characteristics scar on stem axis made by leaf abscision

Answer 6

leaf scar

Question 7

small modified leaves for protection from desiccation

Answer 7

bad scales

Question 8

is an immature leaf of the shoot

Answer 8

leaf primordium

Question 9

these cells divide perpendicular to the surface of the shoot apex

Answer 9

tunica

Question 10

cells divide parallel to the surface of shoot apex

Answer 10

corpus

Question 11

where new leaves and tissues of the stem arise

Answer 11

shoot apex

Question 12

models of tissue organization in the shoot apex

Answer 12

• apical cell theory
• histogen theory
• tunica corpus (most accepted in angiosperms)

Question 13

• each develop from independent group of initials
• meristems are destined from the beginning to produce certain tissues

Answer 13

histogen theory

Question 14

no constant relationship can be traced between the particular initials of the promeristem and the inner tissues of the shoot

Answer 14

tunica corpus theory

Question 15

zonation in shoot apex

Answer 15

• central zone - waiting meristem or promeristem
• rib zone or pith rib meristem
• peripheral zone or peripheral meristem

Question 16

corpus + portions of tunica

Answer 16

central zone

Question 17

• below central zone; center location
• becomes the pith

Answer 17

rib zone

Question 18

• encircles the other zone
• gives rise to leaf primordial, procambium, cortical ground tissue

Answer 18

peripheral zone