Invertebrates
What is an animal without a backbone?
An invertebrate
What are some animals this phylum includes that are on the notes?
Clams, snails, slugs, and octopi
What are some echinoderms that are in the notes?
Sea stars, sand dollars, sea urchins, and sea cucumbers
This phylum has the _____ number of species
most
What are the two general body shapes of jellyfish?
A medusa or a polyp
95% of all animals are what?
invertebrates
This phylum has the ________ highest number of species
Second
What is a sea star supported by?
Hard, flat plates
What is this phylum’s largest class?
The insect class
What kind of skeleton does a jellyfish have?
A hydrostatic skeleton
True or false: an invertebrate does not have a skeleton
False
What are the three major classes of mollusks?
Gastropoda, Bivalvia, and Cephalopoda
What acts as a suction cup for the sea star?
Tube feet
What are some roles of arthropods that are mentioned in the notes?
Pollinators, decomposers, crop eaters, disease carriers, and parasites
_______ are painful stingers
Nematocysts
Does an invertebrate have an internal or external skeleton?
They have both
What can an octopus do to its arm if it is lost?
It can regrow the arm
What can a sea star do to its arm if it is lost?
It can regrow the arm.
What are the non-living and hard outer coverings that arthropods have?
An exoskeleton
The bodies of cnidarians have ______ symmetry
Radial
What are materials similar to an invertebrates skeleton?
Limestone, glass, and protein. Maybe water as well.
What function do clams perform that is useful for water?
They are filter feeders which eat floating particles in the water.
What is a sea stars favorite prey?
Clams
What are the three body parts of an insect?
The head, thorax, abdomen, and six legs
jellyfish have stinging tentacles surrounding their _______
Mouths