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WorksheetsOcean Invertebrates: Sponges, Cnidarians, & Mollusks
Total questions: 10
Worksheet time: 5mins
What are invertebrates?
Unicellular organisms
Animals with wings
Animals lacking a backbone
Humans
What does a jellyfish use to disable its prey?
Its poisonous umbrella
Its brute strength
Its electrified tentacles
Its spiny barbs full of venom
When a sponge is able to grow back after part of it is released for reproduction, it is known as _____.
Genetic engineering
Pollination
Sexual reproduction
Regeneration
Most cnidarians have _____ instead of complete digestive tracts.
Respiratory organs
Digestive chambers
Complex nervous systems
Digestive polyps
Which of the following statements about sponges is NOT true?
Sponges can produce with or without a mate.
Sponges have a porous texture.
Sponges are a class of aquatic invertebrates that includes coral.
Sponges are among the oldest species on Earth.
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The _____ of a mollusk contains glands that secrete a substance that hardens into its shell.
spine
pod
visceral mass
mantle
Mollusks are _____, which means they don't have backbones.
mammals
vertebrates
invertebrates
hermaphrodites
This type of mollusk can release a dark ink into the water to evade a predator.
Scaphapoda
Gastropod
Bivalve
Cephalopod
These mollusks have two hinged shells that close around the animal for protection.
Bivalves
Chitons
Cephalopods
Gastropods
If you find a gorgeous conch shell washed up on the beach, you've found this type of mollusk.
Gastropod
Monoplacophora
Cephalopod
Bivalve
