Role of Defence

Question 1

Niche

Answer 1

a position or role taken by an organism within its community

Question 2

Structural differences

Answer 2

physical parts of the organism that either protect the organism from being consumed or allow the organism to compete better for scarce resources

Question 3

Chemical defences

Answer 3

toxic, bad-tasting, or bad-smelling chemicals secreted by an organism that either discourage consumers from eating it, poison consumers, or prevent competitors form growing or living nearby

Question 4

Interspecific competition

Answer 4

when members of two different species compete for scarce resources and survival; competition only occurs when there are too many organisms and not enough resources

Question 5

Intraspecific competition

Answer 5

when members of the same species compete aginst each other for scarce resources and survival; causes microevolution because one phenotype or allele will have better survival than another. The scarcer the resources, the more extreme the competition and the faster microevolution occurs

Question 6

Behavioural defences

Answer 6

actions and gestures that are meant to communicate that the organism is dangerous and should b avoided or is harmless and not threatening

Question 7

Protective colouration

Answer 7

bright colours that give a clear warning to potential attackers

Question 8

Cryptic colouration (camouflage)

Answer 8

colours or patterns that allow an rganism to blend into its environment and avoid being seen

Question 9

Mimicry

Answer 9

when a harmless organism has the same bright colouration as an organism that has protective colouration