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biodiversity

Across
Colorful flaky patches that do not need soil to grow.
______ succession begins in a place without soil.
Humans depend on other organisms to help keep the environment _____ for our life.
Very small specialized habitat.
The ability of the environment to meet human needs.
_____ succession begins in a place that already has soil.
Slow development or replacement of an ecosystem.
_______biodiversity makes the ecosystem more stable to environmental changes.
Down
_____ species to live in an uninhabited area.
Specific place where an organism lives.
The number and variety of plants and animals living in an area.
Algae and _____ are examples of lichens.