compare Molluscs( such as a clam) to Arthropods ( such as a crayfish). what are two characteristics the phyla have in common? what are two characteristics that are different between the two?

Similarities between molluscs and arthropods

• They both show bilateral symmetry meaning their bodies can be divided into two equal halves.
• They both have muscular interior to facilitate movement.

Differences between molluscs and arthropods

• Arthropods have an open circulatory system while molluscs have a closed circulatory system
• Arthropods have a hard exoskeleton made of chitin while molluscs have shells for protective covering

Step-by-step explanation

Prié, V. (2019). Molluscs. In Encyclopedia of caves (pp. 725-731). Academic Press.

Klyuchko, O. M., & Klyuchko, Z. F. (2018). Electronic databases of Arthropods: methods and applications. Biotechnologia Acta, 11(4).