B1g Parts 1 And 2 Controlling Plant Growth

Question 1

Cell elongation

Answer 1

Plant cells can get longer

Question 2

Dormancy

Answer 2

Sleeping

Question 3

Geotropic

Answer 3

Growth response to gravity

Question 4

Phototropic

Answer 4

Growth response to light

Question 5

Plant hormones

Answer 5

Auxins

Question 6

Rooting powder

Answer 6

Contains plant hormones

Question 7

Selective weed killer

Answer 7

Contains plant hormones

Question 8

Auxins life

Answer 8

Made and released on tip of shoot —most sent to dark side

Moves through plant in solution-down stem for upward growth

Makes elongate and divide -dark side

Stem bends towards light

Question 9

Roots are

Answer 9

Positively Geotropic
Negatively Phototropic

Away light
Towards gravity-more water

Question 10

Shoots are

Answer 10

Positively Phototropic
Negatively Geotropic

Grow towards light for survival

Question 11

Selective weed killers

Synthetic auxin

Answer 11

Sprayed knot crops to kill weeds
Makes weeds grow too fast and die(roots can get enough water in time)

(Broad leaf plants only- I.e. Dandelions)

Question 12

Rooting powder

Answer 12

New plants from cuttings

Dipped into auxin rooting powder

Auxin stimulates root growth from shoot

Question 13

Fruit ripening

Delay or acceleration

Answer 13

Bananas harvested before ripe-sprayed with hormone ETHENE and ripen when needed

Question 14

Control of dormancy

Answer 14

Hormones can be used to force seeds to germinate

Saves time and money

Question 15

Auxins

Answer 15

Plant hormones