Evolution and Natural Selection

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

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

• Evolution

• Mutation

• Selection

• Traits

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Match the following

change/time=change over time

pos=positive

w/=with

envi=environment

• Best for envi survive and reproduce

• Survival of the Fittest

• Individuals w/pos traits increase/time

• Evolution

• Process of how species change/time

• Natural Selection

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Evolution refers to the changes in ​ (a)   traits over time (thousands to millions of years), resulting in new ​ (b)   that are ​ (c)   for specific environments.

• heritable

• species

• fit

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Match the following terms with their definitions

• A permanent change in the DNA

• Mutation

• a change in a species DNA over time because of natural selection

• Variation

• Any variation that makes an organism better able to survive

• Adaptation

• An inherited trait that makes and individual different

• Evolution

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

A ​ (a)   ancestor is an ancestral ​ (b)   from which later species ​ (c)   .

• common

• species

• evolved

Tags

NGSS.MS-LS4-2

Match the following

• unused organs or bones in an organism

• Homologous Structures

• Organ or bone that is derived from a common ancestor.

• speciation

• the forming of a new species due to isolation

• vestigial structures

• adjustment of an organism due to their environment that gives them a great chance of survival.

• adaptation

• structures that serve identical functions but have different internal anatomy

• Analogous Structures

Tags

NGSS.MS-LS4-2

​ (a)   selection is when humans choose traits of an organism like breeding dogs

• Artificial

• Natural

• Analogous traits