If you're seeing this message, it means we're having trouble loading external resources on our website.

如果你被网页过滤器挡住,请确保域名*.kastatic.org*.kasandbox.org 没有被阻止.

主要内容

生态的不同层次:从个体到生态系统

个体、物种、种群、群落和生态系统……它们之间的差异是什么?'
排序方式:
Biology is brought to you with support from the Amgen Foundation