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A) The part of the sponge anatomy that makes them rigid is oftenpreserved as a microfossil known as: options: conodonts spicules ostracodes B) What is

A) The part of the sponge anatomy that makes them rigid is oftenpreserved as a microfossil known as:

options:

conodonts

spicules

ostracodes

B) What is the name of the life stage when cnidarians areswimmers?

options:

plankton

polyp

medusa

C) What is the name of the life stage when cnidarians aresessile?

options:

polyp

medusa

plankton

D) Select all of the animals in the list below that belong tothe cnidarian group.

options:

Hydras

Starfish

Corals

Jellyfish

Slugs & Snails

Sea Anemones

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