Page 354 Vocab

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