Show:
Earth history
Fossils
Natural selection
Speciation
Drift & Lethal alleles
100
The age of the Earth
What is 4.6 billion years?
100
(On the review worksheet) The group that had the greatest biodiversity during the Permian
What is Amphibia?
100
The first principle of natural selection
What is "organisms produce many offspring"?
100
The type of isolation that occurs when birds start singing different songs
What is behavioral isolation?
100
The type of population that genetic drift mainly affects
What are small populations?
200
The era when humans evolved
What is the Cenozoic era?
200
The number of different species living in the same area at the same time
What is biodiversity?
200
Natural selection acts on this
What is the phenotype?
200
The type of isolation that occurs when part of a species starts mating in a different season
What is temporal isolation?
200
Genetic drift causes populations to lose this
What is genetic diversity?
300
The era when dinosaurs lived
What is the Mesozoic era?
300
The type of rock that most fossils are found in
What is sedimentary rock?
300
An explanation for how differences in human skin color evolved through natural selection (write a paragraph!)
What is as humans moved north out of Africa, some individuals had lighter skin than others. They survived and reproduced more because they could make more vitamin D. Over time, populations of humans in Europe developed light skin.
300
The type of isolation that occurs when a mountain range separates a species
What is geographic isolation?
300
The number of copies of a lethal allele that the offspring need to have the lethal condition
What is 2?
400
The era when plants evolved
What is the Paleozoic era?
400
Where many insect fossils are found
What is in amber?
400
An explanation of how marine iguanas evolved long flat tails through natural selection (write a paragraph!)
What is marine iguanas originally had shorter tails. Some of their offspring had longer tails. They could swim better and get more food, so they survived and reproduced. Over time, the whole population had long flat tails.
400
The first step of speciation
What is isolation? (or separation)
400
The genotype that the parents must have to pass the lethal condition on to their offspring
What is heterozygous?
500
The first life on Earth
What is bacteria?
500
What fossils give scientists information about
What is life in the past?
500
An explanation of how giraffes evolved their long necks through natural selection (write a paragraph!)
What is giraffes originally had short necks. Some of their offspring were born with slightly longer necks than others. They could reach more food, so they survived and reproduced. Over time, giraffe populations developed long necks.
500
The last step of speciation
What is reproductive isolation?
500
A change in allele frequency by chance
What is genetic drift?