Evolution & Natural Selection

New traits (genetic variation) comes from

• Random Mutations

• The environment

• Adaptations

• Animals choosing new traits

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-4

In order for Evolution to happen you need

• Genetic Variation, Selective Pressure, and Inheritance

• Mutations, predators, inheritance

• Predators

• Selection

Tags

NGSS.MS-LS4-4

If a new trait DOES NOT help an organism survive, what may happen to it?

• Not survive or reproduce

• Survive & reproduce

• Survive

• Die

Tags

NGSS.MS-LS4-4

What happens to new traits that HELP organisms survive over time?

• Nothing

• That trait becomes MORE COMMON in the population

• That trait becomes LESS COMMON in a population

• Equally common

Tags

NGSS.MS-LS4-4

Which traits were selected for in whale ancestors?

• Traits that helped them walk on land

• Traits that helped them move in water

• Traits that helped them give birth

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The change in traits over time in a population is known as

• Evolution

• Mutation

• Selection

• Traits

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

NGSS.MS-LS4-6

Body parts of organisms that are the same in structure and position but different in function and shared by a common ancestor.

• embryos

• homologous structures

• analogous structures

• vestigial structures

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

Body parts that function like each other, but are different in structure and NOT shared by common ancestor

• embryos

• homologous structures

• analogous structures

• vestigial structures

Body parts that have lost their original function.

• embryos

• homologous structures

• analogous structures

• vestigial structures

Tags

NGSS.MS-LS4-2

Two organisms that are closely related would have

• Very similar DNA sequences

• Very different DNA sequences

• The same exact DNA sequences

• No similarity in DNA

Tags

NGSS.MS-LS4-2