Final Exam (New) Flashcards
What is the fraction of animals that are exclusively marine?
1/3
What are soft-bodied animals that lack a rigid internal skeleton?
Invertabrates
What are chordates?
Animals with stiffened notochord transitional between invertebrates and vertabrates
What are animals with fully functional backbones and an internal skeleton?
Vertabrates
What organisms are suspension feeders and don’t have a circulatory or digestive system?
Sponges
What are collar cells?
Turn flagella to pump water inside of the sponge
What are some examples of invertabrates?
sponges, coral, jellyfish, anemones, worms, mollusks, arthropods, echinoderms
What are some examples of chordates?
salps, sea squirts
What are cnidaria?
carnivorous animals capable of stinging
What are some examples of cnidaria?
jellyfish, anemones, and corals
What are the two forms of cnidaria?
Medusa (jellyfish) and Polyp (anemones)
What are the three types of worms?
Flat, Round, Segmented
What are the three types of mollusks?
gastropods, bivalves, and cephalopods
What are gastropods?
snails, nudibranchs
What are bivalves?
clams, oysters, mussels
What are cephalopods?
octopus, squid - including the giant squid
What do mollusks have?
a muscular foot and shell
What is the most famous abyssal giant?
giant squid
What are some characteristics of arthropods?
exoskeleton, striated muscle, articulated movement
What are the most successful class of marine animals?
crustaceans
What are examples of ehinoderms?
sea stars, brittle stars, sea urchins, sand dollars, sea cucumbers
What do all echinoderms have/dont have?
5-section radial symmetry, have no eyes or brain
What are some characteristics of salps/tunicates?
suspension feeders, two body openings, lose notocord as they develop, solitary, free swimming/attached
What is the transitional animal to vertebrate fish?
amphioxus