Chp 8 Plant Stimuli

Question 1

Xylem

Answer 1

Transports water to the cells (Vacuole)

Question 2

Phloem

Answer 2

Transports “liquid” sugar to the chlorpath

Question 3

Stomata

Answer 3

Transports gasses in and out of the leaf (photosynisis)

Question 4

Stimuli(us)

Answer 4

Any changes in an organisms environment that causes a reaction

Question 5

Tropism

Answer 5

A response that results in a plant growth toward (+) or away (-) from a stimulus

Question 6

Phototropism (light)

Answer 6

The growth of a plant toward or away from light

Roots: negative
Stems and leaves: Positive

Question 7

Thigmotropism (Touch)

Answer 7

A response of a plant being touch

Leave closes when being touched (negative)
Plant touches a wall and grows up it (positive)

Question 8

Gravitropism (gravity)

Answer 8

The response of a plant to gravity

Roots: positive
Stems and leaves: negative

Question 9

Hydrotropism (water)

Answer 9

Plants response to water

Stems and leaves (negative)
Roots: positive

Question 10

Plant hormones

Answer 10

Chemicals that act as messengers

Question 11

Auxin

Answer 11

Stimulate growth

Main chemical responsible for phototropism
Gather on the dark side

Question 12

Ethylene

Answer 12

Chemical (gas) that stimulates ripping fruits

Rotten fruit produces the most ethylene