Question

7) state 2 key characteristics and 2 examples for each of the following phyla: A) Mollusca B) Nematoda C) Arthropoda D) Annelida​

Answer 1

Mollusca

• Produce a shell reinforces with calcium
• Bilateral symmetry
• Examples: Snails, octopus, and clams

Nematoda

• Bilateral symmetry
• Cylindrical in shape
• Examples: Hookworm and eelworm

Arthropoda

• Hard exoskeleton made of chitin
• Segmented bodies, jointed limbs
• Examples: Insects, spiders, and crabs

Annelida

• Have segmented bodies
• Have mouth and anus
• Examples: Earthworm and leach