1What do simple organisms need?
Favourable environment
2How do simple organisms respond?
By moving to suitable areas
3What is tactic response?
Directional movement to a stimulus
4What is kinetic response?
Non-directional movement to a stimulus
5What is a choice chamber used for?
Investigating animal responses
6What does a choice chamber consist of?
Different conditions for stimuli
7What is the control in a choice chamber experiment?
Normal environment without stimuli
8What should you record in a choice chamber?
Number of organisms in each condition
9What is tropism?
Growth movement in plants
10What is phototropism?
Response to light
11What is gravitropism?
Response to gravity
12What is positive phototropism?
Growth towards light
13What is negative phototropism?
Growth away from light
14What is positive gravitropism?
Growth towards gravity
15What is negative gravitropism?
Growth away from gravity
16What are growth factors?
Hormones controlling growth in plants
17Where are growth factors produced?
Growing regions of shoots
18What is IAA?
Indoleacetic acid, an auxin
19What does IAA stimulate in shoots?
Cell elongation
20What does IAA inhibit in roots?
Cell elongation
21Where does IAA move to in light?
Shaded parts of shoots
22Where does IAA move to in gravity?
Lower side of roots
23What does IAA cause in shoots?
Bends towards light
24What does IAA cause in roots?
Bends towards gravity
25How do roots grow in uneven moisture?
IAA concentrates in moist side
26What does IAA in roots cause?
Slower growth on moist side
27What is phototropism's purpose?
Maximizes light for photosynthesis
28What is gravitropism's purpose?
Anchors plants and accesses nutrients