Natural Selection

What is natural selection?

• When reproduction occurs and mutations happen.

• When a offspring has the traits from its parents.

• When an organism is able to camoflauge in its environment.

• the process whereby organisms that are better adapted to their environment tend to survive and reproduce more offspring.

In a cold environment what would be some adaptive traits? Sellect all that apply.

• thick blubber

• thick fur

• thin fur

• strong muscles

What is a mutation?

• When animals have extra legs

• When a frog has 3 eyes

• When genes or DNA have been alterd or changed

• When RNA is upside down

What is a trait?

• a color

• the quality or characteristic of an organism

• the DNA of an organism

• when mutatuons cause extra limbs.

Which of these are possible traits of a rattle snake?

Select all that apply

• venom

• rattle

• hair

• legs

• scales

If an organism can't adapt fast enough, this might happen.

• hibernate
• stay the same
• live longer
• become extinct

Darwin said that within a species there will be _________________________

• nothing different
• variation/differences

What can happen to a species over time if some of the organisms have an advantage?

• The population will decrease
• The population will become extinct
• The population will slowly increase

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because they come from dominant alleles.

• Because they come from recessive alleles.

• Because the organism knew it needed that trait, survives, and passes it on.

Why is the mouse population changing over time?

• 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