Science Unit 3 Vocab: Invertebrate Phyla

2. The pattern of changes that occurs in each generation of species.
7. A major change in an animal’s body shape during its life cycle.
9. An immature insect that resembles an adult but has no wings.
11. A small sea animal that catches food with stinging tentacles and mostly lives in colonies called reefs.
12. A young animal that develops into an adult by a complete change in body shape.
13. A sea animal with an internal skeleton and a body divided into 5 equal parts.
14. The central body part of an arthropod (between the abdomen and the head).
15. A mollusk with a shell made of two parts, such as oysters and mussels.

1. Long sensory organs on an arthropod’s head.
3. A hard, outer skeleton that surrounds an animal’s body.
4. An invertebrate with jointed legs and two pairs of antennae, such as a crab.
5. A small sea animal with a hollow cylindrical body and a ring of tentacles around its mouth. 1 of 2 stages in the cnidarian life cycle.
6. An animal without a backbone.
8. The umbrella-shaped, swimming stage in the life cycle of jellyfish and other cnidarians.
10. A soft-bodied invertebrate that is often protected by a hard shell.