Unit 8 - Ecology Flashcards
1
Q
How do organisms respond to changes in the environment?
A
through behavioral and physiological mechanisms
2
Q
What are examples of behavioral mechanisms?
A
taxis and kinesis
migration
3
Q
What are examples of physiological mechanisms?
A
- hibernation/ estivation
- circadian rhythms
- phototropism
- photoperiodism
4
Q
Taxis
A
a type of movement behavior in organisms where they move toward or away from a stimulus
5
Q
What is a stimulus?
A
a signal or change in the environment
6
Q
Positive taxis
A
movement towards a stimulus (ex. flies moving to a light)
7
Q
Negative Taxis
A
movement away from a stimulus (ockroach running away when you turn on a light)
8
Q
What is a receptor?
A
the part of an organism that detects the stimulus
9
Q
What are the 2 types of taxis?
A
phototaxis and chemotaxis
10
Q
Phototaxis
A
light taxis
11
Q
Chemotaxis
A
immune so movement towards or away from chemical
12
Q
A
