Across
- 4. The process by which living things change over time
- 7. A species that is at risk of going extinct (disappearing forever) because there are very few left
- 8. The instructions inside every living thing that tell the body how to grow and function
- 9. Body parts in different species that look similar because they came from a common ancestor, even if they have different functions (i.e. human arms and bat wings)
- 12. Similar DNA that makes organisms closely related
- 13. The movement of animals from one place to another, usually to find food, better weather, or to have babies
- 14. A very early stage of development for a baby animal or plant before it is born or hatched
Down
- 1. Body parts that no longer have a useful function but were useful to ancestors
- 2. The collection of all fossils that scientists have found, which provide us with insight into how life on Earth has changed over time
- 3. The theory that different species or organisms share a common ancestor if they descend from the same ancestral population
- 5. Body parts in different species that have the same function but are not from a common ancestor
- 6. The variety of all living things in an area
- 10. A group of living things that are similar and can reproduce together (i.e. breeds of dogs)
- 11. A community of living things (plants, animals, and microorganisms) interacting with their environment (like air, water, and soil)