| A | B |
|---|
| vertebrate | an animal w/ a backbone |
| invertebrates | animals w/out a backbone |
| specialization | adaptation of a cell for a particular function |
| cell junctions | connections between cells that hold the cells together as a unit |
| ingestion | intake of organic material by animal,usually in the form of other living things |
| zygote | in sexual reproduction, the 1st cell of a new individual |
| differentiation | cells become different from each other |
| neurons | cells of nerve tissue that transmit electrical signals |
| animals | multicellular heterotrophic organisms that lack cell walls |
| heterotroph | organism that gets organic food molecules by eating other organisms or their by products |
