MCQ
How can the changes that take place in communities during ecological succession be classified as?
- ARandom
- BNot influenced by the physical environment.
- ✓Orderly and sequential
- DVery quick
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P(x) = `{{:(x^2/"k"";", x = - 4"," - 3"," - 2"," - 1),(0";", "otherwise"):}`
Then, E(X) = ______