evolution part 2

fossils are found in what type of rock

how we define a species using the biological species concept

• any male or female that can produce offspring that is fertile is the same species

• any male or female that can produce offspring that is sterile is the same species

• any male or female that can not produce offspring that is fertile is the same species

• any male or female that can not produce offspring that is sterile is the same species

what organisms can not use the biological species concept

how do we divide organisms into different species

3 ways two populations might be isolated from eachother

what happens when a species becomes extinct

• the amount of their species dramatically increases

• they are taken out of the food chain and it affects other prey and predators

• mutations begin to happen and they create new species

• they continue to reproduce

scientists estimated that __ percent of species that have ever lived on earth are now extinct

evolution on a small timescale

• macroevolution

• coevolution

• microevolution

• divergent evolution

evolution on a very large time scale

• coevolution

• microevolution

• divergent evolution

• macroevolution

different species look and act similar