Across
- 3. -the idea that new members of species were created by god and sprang up all the time
- 4. organisms that have cells with an elaborate system of internal membranes and membrane bound organelles
- 7. a hard covering surrounding the body such as a shell
- 8. a member of the chordate class Amphibia, which includes the frogs, toads, and salamanders, as well as the limbless caecilians.
- 10. a group of mammals including lemurs, monkeys, and apes
- 12. a member of the animal phylum Arthropoda, which includes the insects, spiders, ticks, mites, scorpions, crustaceans, millipedes, and centipedes.
- 14. a group of silurian fishes that lived about 400 million years ago
- 16. When solid plates slowly move above a viscous but fluid layer
Down
- 1. a theory that early eukaryotic cells acquired the precursors of mitochondria and chloroplasts by engulfing certain types of bacteria.
- 2. When vesicles surround the right (exact) ribosomes, and forms something similar to a living cell.
- 5. a member of a class of tracheophytes that reproduces by means of seeds formed inside cones that retains its leaves throughout the year.
- 6. a member of the chordate class Mammalia, which includes vertebrates with hair and mammary glands.
- 9. evolved from amphibians and have adaptations to life on land
- 11. A human or a prehistoric relative of humans, beginning with the Australopithecines, whose fossils date back to at least 4.4 million years ago.
- 13. an RNA molecule that can catalyze certain chemical reactions, especially those involved in the synthesis and processing of RNA itself.
- 15. The relatively sudden disappearance of a wide variety of species over a large part of Earth
- 16. An organism whose cells are prokaryotic; bacteria and archaea are prokaryotes
