Evolution & Natural Selection

What is Evolution?

• the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits

• the genetic change in the characteristics of a species over many generations, resulting in the formation of new species

• the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations

• What isn't evolution?

Who wrote 'On the Origin of Species'?

• Charles Darwin

• David Attenborough

• Isaac Newton

• Ms. Sandow

What is 'Common Decent'?

• an effect of speciation, in which multiple species derive from a single ancestral population.

• the idea that although we aren't related, we all have things in common.

Natural selection is the process by which random evolutionary changes are selected for by nature in a consistent, orderly, non-______ way

Artificial selection is different to natural selection because...

• It produces things that aren't alive

• Animals that aren't meant to reproduce do it spontaneously in nature

• Humans are interfering with the selection process

Which of the following is NOT artificial selection:

• Orange carrots

• Pugs

• Polar Bears

• Dairy cows

What is the Geological Time Scale?

• The Fossil Record

• The Sea Life Record

• How we value rocks

A replacement fossil forms when...

• the dead body partially decays and leaves a black deposit

•  part of the organism is preserved with its original chemical composition

• a part of the organism is chemically changed or replaced into another mineral

The structure is the same but the function is different...

• Homologous Structures

• Analogous Structures

Share the same function but the structure is different...

• Homologous Structures

• Analogous Structures