Natural Selection
Natural Selection
Evolution
Evidence of Evolution
Natural selection and evolution
100

What is natural selection?

A process in which species that are best adapted to their environment are able to survive, reproduce and pass along their genetic information

100

True or false : populations evolve, not individuals.

True

100

What causes evolution?

Natural selection over generations

100

Bat wings, cat paws, and whale fins are an example of this

Homolgous structure

100

What does common ancestry mean?

Species that are related shared a common ancestor

200

What is an adaptation?

Any inherited characteristic that increases an organisms chance of survival

200

The passing of a physical traits of organisms in the same species 

heredity 

200

What is the evidence for common descent? name two

Homologies in Anatomy, fossils, homologies in  embryology, molecular homologies and biogeography

200

How are fossils used as proof of evolution?

Show how species change over time (oldest buried deepest, most recent near the surface)

200

Random errors in DNA during replication

Mutations

300

What adaptation do polar bears have and how does it help them? 

Polar bears have thick white fur which keeps them warm and allows them to hide from their prey

300

Explain which mouse is better adapted to this environment. 

The grey mouse is better adapted to this environment. Its fur color blends in with the environment and therefore is not seen by predators.

300

True or false: evolution happens quickly and can change in one generation

False

300

What is homologies in anatomy, and why is it used as proof of evolution?

Homologies in anatomy is similar body structures between species.  Species that share a common ancestor have body structures that are similar because the common ancestor had those structures

300

In an arctic habitat; are white foxes or grey foxes more likely to survive and why?

White foxes are more likely to survive becase their white coats help them blend into the snow

400

What are the four factors drive natural selection?

over production, limited resources, competition and variation

400

The limit of organisms an environment can survive based on resources, food, shelter and water

Carrying capacity

400

Fill in the blank: Organisms with traits that _____ their chances of surviving and reproducing in their environment tend to leave more offspring

Increase

400

How is embryology proof of evolution? 

Many organisms of different species look similar during early stages of development. 

400

What causes variation in a population? (List 2)

mutations, sexual reproduction

500

In an environment with food that grows on trees; are animals with long legs more likely to survive than animals with short legs and why?

Yes, animals with long legs, necks or any trait that makes them taller will be more likely to survive because they have easier access to food.

500

The amount of variety of biological species on earth

biodiversity

500

Fill in the blank: Natural selection over many generations causes ______

Evolution

500

What is molecular homology and how is it used to see how related 2 species are?

Molecular homology involves comparing DNA or amino acids of species. The more similar the DNA is, the more recently they shared a common ancestor

500

What organism can survive space? What is the  adaptation that allows the organism to do so?

Cryptobiosis - an ability to pause metabolic activities

The organism that can do this is a tarigrade