Question

It appears to possess the following characters Protein (chitin) exoskeleton B Calcium carbonate shell C Waterproof skin (fully terrestrial) D Segmentation (repeated parts) E Jointed legs F* 3 pairs of jointed legs 4 pairs of jointed legs (not claws) H* 20+ pairs of jointed legs Radial symmetry Grasping claw(s) Single muscular hydrostatic "foot" L Multiple hydrostatic “tube-feet” Jointed antennae This species appears most closely related to
butterfly

Answer 1

1. chitin exoskeleton- characteristic of arthropods.
2. calcium carbonate shell - characteristic of mollusca. also seen in highly evolved arthropods.
3. waterproof skin - characteristic of reptiles and also in arthropods it have a procuticle which act as a thin waxy outer layer water resistant covering.
4. segmentation- characteristic of annelida, arthropoda and chordata.
5. jointed legs- characteristic of arthropods.
6. radial symmetry - characteristic of cnidaria, ctenophora, and echinodermata( larva)
7. grasping claw - in arthopods it is called chelae
8. singe muscular hydrostatic foot - well developed principle wing muscle seen in flies of arthropoda.
9. multiple hydrostatic tube feet - tube feet is a characterstic of echinoderms. hydrostatic skeleton is seen in less evolved arthropods from annelids.
10. jointed antennae - arthropods have jointed appendages that can be in the form of antennae, wings, legs or mouthparts.

all these characteristics indicate a species related to phylym arthropoda