stimulus and response

Question 1

explain the advantage to organisms of being able to respond to stimuli

Answer 1

moves towards beneficial stimuli

move away from harmful stimuli

more likely to survive

Question 2

define stimulus

Answer 2

a detectable change in the internal or external environment an organism, that leads to a response in that environment

Question 3

define response

Answer 3

an action carried out by an organism in response due to a stimulus

Question 4

define kinesis

Answer 4

a form of response where organisms move randomly

Question 5

define taxis

Answer 5

a simple response where the direction of organism is determined by direction of a stimulus

Question 6

what are the 2 types of taxis

Answer 6

positive taxis

negative taxis

Question 7

define positive taxis

Answer 7

organism moves entire body towards a favorable stimulus

Question 8

define negative taxis

Answer 8

organism moves entire body away from an unfavorable stimulus

Question 9

give 2 examples of types of taxis

Answer 9

phototaxis

chemotaxis

Question 10

define tropism

Answer 10

the growth of a plant in response to a directional stimulus

cells elongate on one side of the structure so grow towards or away from stimulus

Question 11

what are the 4 types of tropism

Answer 11

positive phototropism
negative phototropism

positive gravitropism
negative gravitropism