Plant Hormones

Question 1

tropism

Answer 1

plants’ growth response

Question 2

gravitropism

Answer 2

response to gravity

Question 3

phototropism

Answer 3

response to light

Question 4

geotropism

Answer 4

response to gravity

Question 5

thermotropism

Answer 5

response to temperature change

Question 6

positive phototropism

Answer 6

auxins (elongation) diffuse darker side, grows, heavier, shape towards light

Question 7

positive geotropism

Answer 7

auxins (inhibit cell elongation) diffuse bottom ,top grows, root grows downwards in response to gravity

Question 8

etiolation

Answer 8

plant looks for light so grows spindly, premature droppings, pale

Question 9

ethene

Answer 9

cause of ripening

Question 10

ethylene

Answer 10

coordinates and regulates aspects of ripening, feedback mechanism

Question 11

dormancy

Answer 11

germination of seeds is stopped until conditions are ideal

Question 12

gibberellic acid

Answer 12

promotes alpha sugar production, more amylase, more starch into maltose, more energy, more germination, higher internode length = more cell elongation

Question 13

selective weed killer

Answer 13

broad so absorbs synthetic auxin and etiolate

Question 14

herbicides

Answer 14

broad so absorbs synthetic auxin and etiolate and biodegradable = no harm soil

Question 15

cuttings

Answer 15

grow into new plant asexual, stalk end dipped into root powder of auxins = root develop so plant can fully develop

Question 16

seedless fruit

Answer 16

gibberellin sprayed on flowers so seeds don’t develop