Upload
brian-bennett
View
215
Download
0
Tags:
Embed Size (px)
Citation preview
Natural Selection
Charles Darwin’s Big Ideas!
Principles of Natural Selection
Principles of Natural Selection
There is variation within populations (i.e.; not all penguins or dandelions are alike)
Variation is a result of sexual reproduction and mutations in genes
More offspring are produced than can liveThere is competition for limited resourcesOrganisms with the best traits
(adaptations) survive and pass on their genes to their offspring
There is variation within populations (i.e.; not all penguins or dandelions are alike)
Variation is a result of sexual reproduction and mutations in genes
More offspring are produced than can liveThere is competition for limited resourcesOrganisms with the best traits
(adaptations) survive and pass on their genes to their offspring
Polar Bear ParagraphPolar Bear Paragraph
Polar Bears, with their thick layer of fur and fat, are well adapted to cold climates. In terms of evolution and natural selection, how did these changes in the polar bear occur over time?
Polar Bears, with their thick layer of fur and fat, are well adapted to cold climates. In terms of evolution and natural selection, how did these changes in the polar bear occur over time?
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Polar Bear Paragraph Answer
Polar Bear Paragraph Answer
There is variation among polar bears. Not all polar bears are the same due to genetic differences. Some polar bears are better adapted (just by luck!) to their environment. More polar bears are produced than can survive. There is competition for limited resources. Those polar bears with the best traits, survive and pass on their genes for thick fur and fat to their offspring.
There is variation among polar bears. Not all polar bears are the same due to genetic differences. Some polar bears are better adapted (just by luck!) to their environment. More polar bears are produced than can survive. There is competition for limited resources. Those polar bears with the best traits, survive and pass on their genes for thick fur and fat to their offspring.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Cave Salamander Paragraph
Cave Salamander Paragraph
Cave Salamanders are blind (they have eyes which are not functional). How would a biologist explain how blind cave salamanders evolved from sighted salamander ancestors?
Cave Salamanders are blind (they have eyes which are not functional). How would a biologist explain how blind cave salamanders evolved from sighted salamander ancestors?
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Cave Salamander AnswerCave Salamander AnswerThere is variation among cave
salamanders. Not all cave salamanders are the same due to genetic differences. Some cave salamanders are better adapted (just by luck!) to their environment. More salamanders are produced than can survive. There is competition for limited resources. Blind cave salamanders are able to smell food more easily. Those cave salamanders with the best trait(s) survived and passed on the gene for being blind to their offspring.
There is variation among cave salamanders. Not all cave salamanders are the same due to genetic differences. Some cave salamanders are better adapted (just by luck!) to their environment. More salamanders are produced than can survive. There is competition for limited resources. Blind cave salamanders are able to smell food more easily. Those cave salamanders with the best trait(s) survived and passed on the gene for being blind to their offspring.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.