Comparative Anatomy

123456
Across
  1. 3. record A collection of fossils over time that shows changes in organisms.
  2. 6. Observing similar structures in organisms and comparing them to each other.
Down
  1. 1. Preserved organisms from many years ago showing a record of past life.
  2. 2. A system in organisms made up of bones; organisms can have an exoskeleton (outside the organism) or an endoskeleton (inside the organism).
  3. 4. Any living thing.
  4. 5. An unborn or unhatched baby.