The Sensory system in plants

Question 1

Why plants are simpler and slower?

Answer 1

no receptors

Question 2

defined as any external and internal changes in the environment that cause a response

Answer 2

stimulus

Question 3

A process where light is necessary. Plants produce food through this

Answer 3

photosynthesis

Question 4

a term used for non-directional development responses of plants to light

Answer 4

photomorphogenesis

Question 5

The result of photomorphogenesis

Answer 5

changes in form or flowering

Question 6

Which is a directional plant growth response.

Answer 6

phototropism

Question 7

a pigment -containing protein, is present in plants, as well as in green algae.

Answer 7

Phytochrome

Question 8

Phytochrome exists in two convertible forms:

Answer 8

Pr (phytochrome red) and pfr (phytochrome far red)

Question 9

shading in plants result in an increase in far red light compared to red light

Answer 9

Plant Spacing

Question 10

directional response due to a directional stimulus like light

Answer 10

Phototropism

Question 11

inhibited by far red (Pr) light and stimulated by red (Pr) light in many plants.

Answer 11

Seed Germination

Question 12

results in etiolation is explained by the absence of red light.

Answer 12

Shoot Elongation

Question 13

This response of plants to gravitational force

Answer 13

gravitropism

Question 14

is shown in the response of makahiya (Mimosa pudica) to touch

Answer 14

Thigmonasty

Question 15

When touched, there are changes that happen in the turgor pressure at the base of each pulvinus cell

Answer 15

Thigmonasty

Question 16

show long, weak stems, and smaller leaves due to longer internodes.

Answer 16

Etiolated plants

Question 17

A directional growth response of a plant or a plant part in response to a contact with an object like fence, wire, plant, or animal

Answer 17

Thigmotropism

Question 18

Example of Thigmotropism

Answer 18

Twining plant’s tendril

Question 19

This change in turgor pressure causes the leaflets to

Answer 19

close or fold

Question 20

sinks towards the center of gravity

Answer 20

Amyloplasts

Question 21

what do you call a negative to positive response?

Answer 21

Bravitropic response

Question 22

Plant response in Mechanical stimuli

Answer 22

1. turgor pressure cause to close or fold
2. ions move outer
   3.rapid water transport (out cells)
3. 15-30mins regain turgidity reversible response

Question 23

Plant responses are not limited to growth responses.

Answer 23

Temperature

Question 24

adaptive measure in plants when environmental conditions are not favorable.

Answer 24

Seed dormancy

Question 25

stay dormant for hundreds of years

Answer 25

Seed dormancy

Question 26

in plants, the process by which leaves are shed is called

Answer 26

abscission

Question 27

Shedding of leaves help plants

Answer 27

conserve water and energy and withstand cold temperature

Question 28

forms that proceeds downwards until the leaf is separated from the stem

Answer 28

Tear line

Question 29

prevent water loss and to prevent the invasion

Answer 29

protective covering

Question 30

is formed between the stem and the base of the pertriole of the leaf

Answer 30

abscission layer (this also swell)

Question 31

responsible for the formation of the abscission layer

Answer 31

abscisic acid