Evolution

Gaiser Life Science

KnowWhat do you know about evolution?

Evidence

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“I don’t know anything.” is not an acceptable answer.Use complete sentences.

After listening to the PowerPoint lecture, come back here and list evidence to explain why your answer to the above question is or is not a good answer. You may also use other outside sources to help you respond.

Choose any vocabulary word except competition and make a drawing that represents the definition of the word you chose.

Clarifying ?s Information

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Who? Charles Darwin was a naturalist (a person who studies nature) who traveled for 5 years on the HMS Beagle (a British ship). He made and recorded thousands of observations of plants and animals. His best known research was done in the Galapagos Islands.

Evolution

species - a group of similar organisms that can mate with each other and produce fertile offspringDarwin took note of similarities and differences between mainland and island birds and animals.

adaptationsExample: the shapes of birds’ beaks

evolution - a gradual change in a species over time in order to adapt to new conditions in the environment

natural selection

- characteristics that help organisms survive and reproduce

- individuals who better adapt to their environment have a better chance to survive and reproduce

overproduction - when a species produce more offspring than the environment can support

FYI - The phrase “Survival of the fittest” was introduced by Herbert Spencer, a contemporary of Charles Darwin. The phrase essentially means the same as “natural selection.”

Clarifying ?s Information

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Evolution

competition - food and resources are limited. Species compete with each other to survive.

Example: A musk ox's diet consists of plants such as sedges and grasses, while a caribou's is made of berries, grass and sedge. When food is hard to find in the tundra, musk ox and caribou might have some competition trying to get something to eat. (from answers.com)

variationExample: coloring

selection - Species with traits that promote survival live and reproduce. Over time, traits that do not promote survival are not carried to the next generation.

- any difference between individuals of the same species

New species

Example: Grand Canyon Squirrels - The kaibab squirrels and the albert squirrels were separated by the natural barrier (the Grand Canyon) They started out as the same species but, eventually developed into two separate species of squirrels.

Summary:

When a group separates from a species over several generations, different traits evolve.

Clarifying ?s Information

Page #

Evolution

Who? Charles Darwin was a naturalist (a person who studies nature) who traveled for 5 years on the HMS Beagle (a British ship). He made and recorded thousands of observations of plants and animals. His best known research was done in the Galapagos Islands.

species - a group of similar organisms that can mate with each other and produce fertile offspringDarwin took note of similarities and differences between mainland and island birds and animals.

adaptationsExample: the shapes of birds’ beaks

evolution - a gradual change in a species over time in order to adapt to new conditions in the environment

natural selection

- characteristics that help organisms survive and reproduce

- individuals who better adapt to their environment have a better chance to survive and reproduce

overproduction - when a species produce more offspring than the environment can support

FYI - The phrase “Survival of the fittest” was introduced by Herbert Spencer, a contemporary of Charles Darwin. The phrase essentially means the same as “natural selection.”

Clarifying ?s Information

Page #Summary:

Evolution

competition - food and resources are limited. Species compete with each other to survive.

Example: A musk ox's diet consists of plants such as sedges and grasses, while a caribou's is made of berries, grass and sedge. When food is hard to find in the tundra, musk ox and caribou might have some competition trying to get something to eat. (from answers.com)

variationExample: coloring

selection - Species with traits that promote survival live and reproduce. Over time, traits that do not promote survival are not carried to the next generation.

- any difference between individuals of the same species

New species

Example: Grand Canyon Squirrels - The kaibab squirrels and the albert squirrels were separated by the natural barrier (the Grand Canyon) They started out as the same species but, eventually developed into two separate species of squirrels.

When a group separates from a species over several generations, different traits evolve.

This PowerPoint was created by Tim Paterek from Charlene Shea’s lecture This PowerPoint was created by Tim Paterek from Charlene Shea’s lecture notes. All pictures came from Google Image Search. To fall within the Fair notes. All pictures came from Google Image Search. To fall within the Fair Use Guidelines, this PowerPoint must be used within the confines of the Use Guidelines, this PowerPoint must be used within the confines of the classroom and may not be published back onto the Internet unless the classroom and may not be published back onto the Internet unless the

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