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Natural Selection
Natural Selection & Competition
| Term | Definition |
|---|---|
| Theory of Natural Selection | Organisms best adapted to the environment will survive and reproduce. |
| competition | when 2 or more organisms struggle for resources like food, space, water, and mates |
| resource | what an organism needs to survive. Examples: water, food, shelter |
| species | organisms that share most of the same traits and can reproduce fertile offspring |
| population | all individuals of one species living in one area |
| fossil | any remains or trace of past life, many fossils are shown in sedimentary rock |
| extinct | when all members of a species have died and no longer exist on earth |
| Common Ancestor | An ancestor (past relative) that two or more species have in common. |
| descendant | something that has come down; your children and grandchildren are your descendants |
| contribute | help to cause; Example: An enormous change in the environment could contribute to the extinction of a species. |
| pesticide | a chemical spray that kills pests or insects |
| resistant | the natural or genetic ability of an organism to avoid being killed by agents such as antibiotics or pesticides |
Created by:
rhk9teachermiron
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