| Across |
| 3. |
the process of concentrating on and becoming expert in a particular subject or skill. |
| 6. |
symmetry. symmetry around a central axis, as in a starfish or a tulip flower |
| 10. |
symmetry. the property of being divisible into symmetrical halves on either side of a unique plane. |
| 11. |
an animal of the large phylum Chordata, comprising the vertebrates together with the sea squirts and lancelets |
| 12. |
an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. The invertebrates constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla. |
| 14. |
Near the front, especially situated in the front of the body or nearer to the head |
| 15. |
the action or process of differentiating |
| 16. |
the act of taking something into the body through the mouth and the process of feeding data into a system: |
| 17. |
further back in position; of or nearer the rear or hind end, especially of the body or a part of it. |
| 19. |
a cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals. |
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|
| Down |
| 1. |
of, on, or relating to the underside of an animal or plant; abdominal |
| 2. |
pouch symmetry. in pairs between the pharyngeal arches |
| 4. |
of, on, or relating to the upper side or back of an animal, plant, or organ. |
| 5. |
living organism that feeds on organic matter, typically having specialized sense organs and nervous system and able to respond rapidly to stimuli. |
| 6. |
a microorganism, especially one which causes disease. |
| 7. |
an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes. |
| 8. |
the concentration of sense organs, nervous control, etc., at the anterior end of the body, forming a head and brain, both during evolution and in the course of an embryo's development. |
| 9. |
a sheet, quantity, or thickness of material, typically one of several, covering a surface or body. |
| 13. |
nerve cord. a hollow tube of nervous tissue that runs along the top of an organism |
| 18. |
fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm) |
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