Answer:
Ecology is the study of organisms and their habitats. All the habitats that make up a forest, river, or desert are called an ___Ecosystem_____________. The ____Biotic______ and non-__Biotic________ parts of an ecosystem are all interconnected. Living _______things_______ rely on the abiotic, or ____biotic__________, parts of the ecosystem. Examples of abiotic factors could include:_________Temperature, moisture, etc A __population__________ consists of many individual ___species_________ of one type. Each unique type of ____group of similar organisms_________ is called a species.
Explanation:
I belive the answer is The best organism is always selected.
The process of evolution will need a long time to show a changes. It should not only a lifetime of the organism, but much longer. The long period cause the process hard to observe. The fossil will show that organism that getting a good trait will survive natural selection, while organism with bad trait will be eliminated.