SCB-M4 U4.3 Adaptation and Evolution

evolution

speciation

adaptation

natural selection

genes.

variations.

traits.

theories.

Competition

Natural Selection

gene flow

genetic drift

The light mice can reproduce more successfully than the dark mice

The hawks eat more dark mice than light mice because the dark mice taste better

The hawks eat more light mice than dark mice because they can see the light mice more easily

The hawks eat more dark mice than light mice because they can see the dark mice more easily

struggle for existence (overproduction)

genetically identical individuals

random mating

no immigration or emigration 

Variation

Adaptation

Behavior

Environment

variation

adaptation

homologous structure

vestigial structure

A trait that increases the fitness of an organism.

A trait that an organism acquires without genetic influence.

A choice made by humans about what organisms breed for advantageous traits.

Physiological

Structural

Behavioral

Structural adaptation

Behavioral adaptation

Physiological adaptation

Structural adaptation

Behavioral adaptation

Physiological adaptation

Structural adaptation

Behavioral adaptation

Physiological adaptation

Structural adaptation

Behavioral adaptation

Physiological adaptation

Populations can survive in different locations on earth

Environmental conditions limit the number of species on Earth

Populations grow when resources are abundant

The traits of a species can change over time

All the animals died.

Only a few animals left.

Dangerous animals.

All the animals died.

Only a few animals left.

Dangerous animals.

A native (naturally found) species which are added to an area. 

A non-native (not naturally found) species added to an area. 

A keystone species in an environment

none of the above