When an elephant's tusks are removed by humans

When an elephant is born without tusks

When an elephant has tusks

When an elephant is killed by poachers for its tusks

More elephants decided to remove their own tusks

The tuskless elephants were able to reproduce and pass the trait down

More elephants had their tusks fall off as they aged

The tuskless elephants all died at this time

Elephants don't need their tusks so there's no reason to have them

There is never an advantage to being tuskless

Elephants don't have to worry about keeping their teeth clean

Elephants won't be targeted by human poachers because they don't have ivory (tusks)

analogous

homologous

vesitigal

Homologous

Analogous

Embryological

Vestigial

Homologous

Analogous

Embryological

Vestigial

Homologous

Analogous

Embryological

Vestigial

Letting dogs choose their own mate

Letting plants pollinate on their own

Crossing a labrador and a poodle to create a labradoodle

In natural selection, traits benefit humans and in artificial selection, the traits benefit the species

In natural selection, traits benefit the species and in artificial selection, the traits benefit humans

In natural and artificial selection, the process takes hundreds of years to occur

In natural and artificial selection, nature determines what traits will be passed down to offspring.

There were MORE LIGHT moths because the bird couldn't see them on the DARK TREES

There were MORE DARK moths because the bird couldn't see them on the DARK TREES

There were MORE DARK moths because the bird couldn't see them on the LIGHT TREES