Friday, May 15, 2009

Evolution and populations

This week we learned about adaptions, population, and evolution. Evolution happens over time. It is the changing of species. We evoloved from apes. Things that come from evolution is adaptations, mutations,natural selections, and selective breeding.

Selective breeding- if the organim is best suited in the environment, then they will survive and reproduce. If the organism doesn't suit in the environment, they will die and not reproduce. If the population changes to quickly, then the organisms can't adapt and will die out.

Mutations-random change in the genes

Adaptations-the changes in physical or behavior traits in response to environment that occurs over time

Selective breeding- changes that are artificial that breed two organisms to make a better one

Population can change in many ways. There could be predators that attack the prey and effect the population. Also, environments can change the population. Disease can effect population too. If animals reproduce it will higher the population. When the predators population goes up, the prey go down. When prey population goes up the predator goes down.

No comments: