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Porifera/Cnidarians/Worms (1ESO)
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Game Code: 1450282
English
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Biology
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These are the simplest invertebrate animals. AKA sponges.
porifera
15
Cells that coat the inner cavity, creating a flow of water.
choanocytes
15
Water, containing waste products, that leaves the central cavity, is released through this hole.
osculum
15
Cells situated in the external layer of the sponge.
incurrent pores
15
A hollow space inside the bodies of porifera that have radial symmetry.
central cavity
15
Cells that form the pores which let the water flow through the porifera.
porocytes
15
Aquatic animals that have radial symmetry. Their cells are grouped in simple tissues. Some have organs.
cnidarians
15
Sac-shaped sessile cnidarians are called ________.
polyps
15
Umbrella-shaped sea cnidarians are called _______.
jellyfish
15
This type of skeleton allows jellyfish to keep their shape by collecting water inside their cells.
hydrostatic skeleton
15
Stinging cells with a coiled flagellum that can inject liquid into prey to paralyse them. They are found in the tentacles of jellyfish.
cnidoblasts
15
Cnidarians are
carnivores
cannibals
herbivores
omnivores
15
Which of these statements about worms is NOT true:
They tend to live in humid climates.
They have bilateral symmetry.
They have radial symmetry.
They do not have jointed appendages.
15
The simplest animals that have bilateral symmetry and cephalisation of the nervous system.
flatworms
15
The concentration of nerve centers at the "head" of the animal's body is known as
filtration
spicules
planariation
cephalisation
10
Parasites that live in the intestines of many animals (including humans).
tapeworms
15
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