Affiliate Marketing Secrets

Making a study guide.
1. Predict the change in an ecosystem if an organism is removed or introduced.
2.Describe how the biological concept of a niche helps reduce competition.
3 What is colonization?
4.Communicate the need to prevent animal extinction.
5.Identify the ecological succession as a series of changes in a community in which new populations of organisms gradually replace existing ones form colonization to climax community and through secondary succession after a disaster.
Thanks to all that help!