Invertebrate Phyla Quiz

The main characteristics of the Porifera Phylum that distinguish it from other invertebrate groups are...

• Having bilateral symmetry and a closed circulatory system

• Having a complex nervous system

• Having a water channel system and choanocyte cells for food filtration

• Having a chitin exoskeleton like arthropods

One of the factors that distinguishes classes in the Phylum Porifera is the composition of their skeleton. Spicules made of silica are found in the class...

• Calcarea

• Hexactinellida

• Demospongiae

• Anthozoa

One of the functions of the water channel system in the body of Porifera is to facilitate the flow of water to obtain oxygen and food. Based on its complexity, which of the following shows the most efficient water channel system in food filtration?

• Asconoid

• Syconoid

• Leuconoid

• Radialoid

The main characteristic of the Phylum Cnidaria that distinguishes it from other invertebrates is...

• Having an exoskeleton made of calcium carbonate

• Having stinging cells (nematocysts) on the tentacles to catch prey

• Having a closed circulatory system

• Having a segmented body and bilateral symmetry

Cnidaria have two main body forms in their life cycle, namely...

• Larva and pupa

• Medusa and polyp

• Planula and trocophore

• Sporophyte and gametophyte

Which of the following is an example of a Cnidaria animal that lives in the medusa form throughout its life?

• Coral (Scleractinia)

• Jellyfish (Scyphozoa)

• Hydra (Hydrozoa)

• Sea anemone (Actiniaria)

One of the characteristics of Platyhelminthes that distinguishes it from other marine invertebrate groups is...

• Having a dorsoventrally flat body and no circulatory system

• Having a segmented body with a closed circulatory system

• Having an excretory system in the form of nephridia

• Having a chitin exoskeleton

A researcher discovered a free-living marine Platyhelminthes species, which has cilia on its surface, and is able to swim with body wave movements. Based on these characteristics, it is likely that this species comes from the class...

• Trematoda

• Cestoda

• Turbellaria

• Monogenea

The main characteristic that distinguishes Mollusca from other invertebrate animal phyla is...

• Segmented body with chitin exoskeleton

• Having an excretory system with nephridia like vertebrates

• Having a soft body, often protected by a calcium carbonate shell

• Having a closed circulatory system like vertebrates

The group of marine molluscs that have tentacles and feet modified into arms are...

• Gastropoda

• Bivalvia

• Cephalopoda

• Polyplacophora