Across
- 3. A change in form, position or condition: amount of change or difference.
- 5. Process by which organisms survive and reproduce, based on their behavior and bodies.
- 6. A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
Down
- 1. A modification of an organism or its parts that makes it more fit for existence.
- 2. The place or environment where a plant or animal naturally or normally lives and grows.
- 4. To an evolutionary biologist, fitness simply means reproductive success and reflects now well an organism is adapted to its environment.