Nature

4. The largest predator in Europe
6. A substance that causes most plants to have a green pigmentation
8. Single-celled organisms that break down organic matter, causing decay
11. The biggest constrictor snakes belong to the ... family
13. A process in green plants that transforms light energy into useful energy for the plant and the byproduct of which is oxygen
14. Forests characterised by high and continuous rainfall
18. Largest known land animals currently
19. A diverse group of photosynthesising organisms that create a significant amount of the Earth’s oxygen
20. A group of crows is called a...

1. The largest known mammal to ever have existed
2. The scientific name for a recently hatched fish
3. An animal that is hunted, captured and eaten by predatory animals
5. Organisms that feed mainly on meat, or the flesh of other animals
7. Semiaquatic reptilians that live in tropical regions of Africa, Asia, Australia and the Americas
9. Fleshy fruiting bodies of fungi that are often edible
10. Small vertebrates hat need water or a moist environment to survive
12. The early bird cathces the...
15. A species of salamander that has the ability to regenerate lost limbs and other tissues
16. The driest place on earth (other than the poles)
17. Elongated, limbless, carnivorous reptiles