Assuming that you're referring to forest ecosystem, the two ecological benefits of this ecosystem are :
- it provides habitats for many organisms
- It provide Oxygen supply for the world
The answer would be C as it can be directly tested experimentally and observed that bacteria adapted to become drug resistant and the natural selection of drug resistant bacteria to survive and continue proliferating, thus being direct evidence of evolution
From: https://answers.yahoo.com/question/index?qid=20111123203903AA4eLha
1. Less trash to landfill. More recycled items = savings to production costs of new items
<span>such as aluminum, glass, cardboard. </span>
<span>2. Most insects have particular predators such as a specific animal or bird that eats them as a major or sole portion of their diet. </span>
<span>3. Do not plant 100% of the same plants and trees across the area. </span>
<span>Do not harvest all of a species during a normal growth cycle. If a tree takes 50 years to grow to harvest size, schedule cuttings to avoid extinction of that tree within the area.</span>
