PLANT PP2 PT1

Question 1

Flowering plants respond to environmental stimuli such as

Answer 1

Light
Gravity
Carbon dioxide levels
Pathogen infection
Drought
Touch

Question 2

Responses to light and gravity, stomata open and close in response to___ which is___

Answer 2

light levels (short term

Question 3

Responses to light and gravity, gravity causes downward growth of the___ which is___

Answer 3

the root (long term)

Question 4

Plant hormones enable plant cells to

Answer 4

to communicate

Question 5

plant hormones are synthesized in

Answer 5

one part of the plant

Question 6

Plant hormones travel within phloem or from cell to cell in response to

Answer 6

the appropriate stimulus

Question 7

These are produced in shoot apical meristem, found in young leaves, flowers, and fruits

Answer 7

Auxins

Question 8

Apically produced auxin prevents the

Answer 8

growth of axillary buds (Apical dominance).

Question 9

Auxin also:
Promotes growth of
Prevents loss of
Promotes positive

Answer 9

roots and fruit
leaves and fruit
phototropism of stems

Question 10

When a stem is exposed to uni-directional light auxin:

moves to
binds to
complex that
activated
cell wall
pressure
cell

Answer 10

moves to the shady side
binds to plasma membrane receptors forming a complex that activates a proton pump
Activated proton pumps H+ out of cell
Cell wall loosens
Pressure increases due to the entry of water
Cell enlarges

Question 11

Abscisic acid (ABA) is produced by

Answer 11

any “green tissue

Question 12

green tissue contains

Answer 12

chloroplasts

Question 13

Abscisic acid is sometimes called the

Answer 13

stress hormone.

Question 14

ABA, the stress hormone initiates & maintains what

Answer 14

seed and bud dormancy.

Question 15

ABA, the stress hormone brings about the___

Answer 15

Brings about the closure of stomata