Plant Responses - Leaving Cert Biology Flashcards

1

How does auxin move through the plant?

In solution by osmosis
As a solid by diffusion
In vascular bundles by active transport
In vascular bundles by diffusion

2

Plant growth in response to gravity is called...

thigmotropism
phototropism
chemotropism
geotropism

3

Tropisms are Reponses to what type of stimuli?

External Stimuli
Internal stimuli

4

What is auxin?

A hormone that stimulates thyroxine
A plant hormone that controls growth
A hormone that prevents fertilisation
A hormone that slows fruit ripening

5

What seeds should be used for the IAA experiment

Broad Beans
Pumpkin seeds
Sunflower seeds
Radish seeds

6

In root cells, IAA causes a...

Positive geotropism
Negative geotropism

7

Where is auxin made?

Flowers
Leaves
Stem
Shoot and root tips

8

The use of auxin on fruit _____________

All of these
Causes root development
Promotes fruit growth
Stimulates positive phototropism

9

Tropism is

A plant that is growing
A plant that is dying
A plant that is growing in response to stimulus
A plant that is dying in response to stimulus

10

Plant growth in response to light is called...

Hydrotropism
Chemotropism
Geotropism
Phototropism

11

Thigmotropism is a plant's response to.....

Touch
Age
Gravity
Water

12

Where in the plant do you find meristem tissue

On the surface of leaves only
All over the plant
Inside the pollen grains
On root and shoot tips

13

What does auxin do to plant cells?

causes cells to get wider
causes elongation
causes cells to divide
causes cells to double

14

Which one of the following is NOT a Plant Growth Regulator

Cytokinins
Meristems
Auxins
Gibberellins

15

Two ways plants can protect themselves are:

Mechanical and physical barriers
Anatomical and chemical barriers
Growth and elongation
Mechanical and water barriers

Plant Responses - Leaving Cert Biology

Questions 15

Plant Responses - Leaving Cert Biology

Questions 15