Plants Theme 5

Question 1

Which hormone promotes growth in plants?

Answer 1

auxin

Question 2

What hormone stimulates growth and elongation of stems in plants and contributes to bolting and fruit enlargement?

Answer 2

Gibberellins

Question 3

What do cytokinins do for plants?

Answer 3

enhance growth and retard aging

Question 4

A gaseous hormone responsible for senescence

Answer 4

Ethylene

Question 5

Abscisic acid (ABA) effect on plant

Answer 5

suppress growth and drought tolerance

Question 6

Brassinosteroid hormone

Answer 6

regulates plant growth

Question 7

jasmonates

Answer 7

regulate growth and role in defense

Question 8

What is phototropism?

Answer 8

directional growth in response to light, due to light triggering auxin transport

Question 9

what mechanisms allow for phototropism?

Answer 9

cells can divide or elongate

Question 10

What is bolting?

Answer 10

development of a flowering stem

Question 11

What is the acid growth hypothesis?

Answer 11

proton pumps pump H into the cell wall, releasing enzymes that break bonds between microfibrils and cellulose, allowing cells to expand

Question 12

What was the cause of potato blight disease?

Answer 12

only growing potatoes

Question 13

what is chlorosis?

Answer 13

yellowing of leafs due to lack of chlorophyll

Question 14

what is the mechanism for physically isolating infection by surrounding it with dead cells?

Answer 14

hypersensitive response

Question 15

What is systemic acquired resistance?

Answer 15

development of an immune response at a distal site

Question 16

What does tannins due to plants

Answer 16

make them taste bitter

Question 17

What do secondary metabolites do

Answer 17

used as defense against insects and fungi, not routinely made by plants

Question 18

What induces compounds in undamaged plants to make them less palatable, and attract predatory insects to feed on parasites

Answer 18

volatile signals

Question 19

What is a Perfect flower?

Answer 19

plants containing both stamen and carpels (male and female organs), most flowers are perfect flowers

Question 20

What is an imperfect flower?

Answer 20

A plant that has a stamen or carpals, not both

Question 21

What does double fertilization form

Answer 21

embryo (2n) and endosperm (3n)

Question 22

What do ovaries develop into?

Answer 22

Fruit

Question 23

What happens when a plant is self pollinated?

Answer 23

not accepted

Question 24

What happens with non-self pollen

Answer 24

pollen tube grows