Classification Puzzle

2. Egg laying mammal
3. How gymnosperms are pollinated
5. An ectothermic vertebrate animal that typically exploits both terrestrial & aquatic habitats
8. Any photosynthetic eukaryote that isn't a land plant
11. Multicellular heterotrophic eukaryote whose cells lack cell walls
13. The period of time an embryo takes to develop before birth
15. The temporary organ that acts as an interface between mother and baby in viviparous mammals
17. Pouched mammal
19. Animal that retains eggs within the mother until hatching
21. Gains energy by eating other organisms
22. The perching birds, identified by their perching style feet
24. Warm blooded
25. An ectothermic vertebrate animal that has leathery shelled amniotic egg

1. The rarest of the 3 amphibian categories; burrows underground
2. An endothermic vertebrate animal that has hair/fur and whose females produce milk for their young
4. Viviparous mammals with a temporary organ that connects mother and baby
6. How angiosperms are pollinated
7. A vascular plant that reproduces seeds on the scales of cones
9. A vascular plant that reproduces seeds using flowers
10. Animal that lays eggs
12. Gains energy through photosynthesis
14. Cold blooded
16. Eukaryotic organism with cell walls containing cellulose that carries out photosynthesis using chlorophyll a & b
18. Animal that keeps embryo inside mother; embryo gets nutrients directly from mother
20. An endothermic vertebrate animal that has hard shelled amniotic eggs
23. The more terrestrial version of a salamander