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45 Cards in this Set
- Front
- Back
What classification describes a group of animals that share similar architecture, level of complexity, and evolutionary history?
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phylum
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Which animal is a suspension feeder?
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sponges
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What needle-like structure provides a skeletal network for a sponge?
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spicules
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The most primitive true animal belongs to the phylum ____.
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Porifera
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What phylum contains jellyfish?
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Cnidaria
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What percentage of all living and fossil animals are invertebrates?
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90%
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What are the stinging cells present in cnidarians?
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cnidoblasts
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Which worm has a segmented body plan?
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Polychaeta
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Platyhelminthes were the first organisms to have ____.
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a central nervous system
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The exoskeleton of an arthropod is composed of ____.
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chitin
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Nautiluses, octopuses, and squid belong to which class?
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Cephalopoda
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What do squid use as a decoy defense mechanism?
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coagulated ink
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Which phylum is found exclusively in marine habitats?
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Echinodermata
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What is an ophiuroid?
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brittle stars
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What makes up the greatest biomass of any species on Earth?
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krill
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What unique feature do all echinoderms have?
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water vascular system
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Which phylum has the most number of species?
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Arthropoda
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Which crustacean is known for grazing on diatoms and dinoflagellates and is among the most abundant multicellular animals on the planet?
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copepods
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What is considered the most structurally complex animal phylum?
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Chordata
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What type of behavior is described as anadromous?
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Migration to freshwater to spawn
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What special tool do tunicates use to obtain more food when suspension feeding?
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mucous plankton net
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What is an invertebrate chordate?
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A chordate that has lost its notochord
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What do the simplest vertebrates lack?
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jaws
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About 90% of all living fishes are contained within the order ____.
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Teleostei
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What is the class of vertebrates who have a skeleton made of cartilage?
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Chondrichthyes
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Where do most seabirds live?
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Southern hemisphere
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Which marine reptiles make long migrations to lay eggs on the very same beach they hatched from?
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Sea turtles
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Which animal is the only herbivorous marine mammal?
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manatee
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Which organism uses echolocation to search for prey?
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toothed whale
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Which is the largest species of shark?
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whale shark
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Polychaetes are the most successful of the worm phyla, being found in terrestrial, aquatic, and marine environments.
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False |
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Marine birds usually avoid land unless they are hunting.
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False |
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Photosynthetic autotrophs changed the composition of the atmosphere during the oxygen revolution.
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True |
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Sharks and rays tend to be larger than bony fish.
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True |
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Schooling behavior makes normally small fish appear like a large organism from a distance.
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True |
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Arthropods have a steady growth pattern growing bigger over time.
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False |
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Squid are the most intelligent invertebrates.
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False |
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Cnidarians exhibit bilateral symmetry, an advancement from the phylum Porifera.
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False |
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The vertebrate skull made the evolution of intelligence possible.
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True |
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The teeth in odontocetes are made of baleen.
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False |
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Coral and barnacles are both arthropods due to their hard outer exoskeletons.
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False |
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The first fish evolved about 50 million years ago.
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False |
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Some mollusks are segmented, indicating a common ancestor with annelids.
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True |
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The evolution of the notochord in chordates permitted a more complex embryonic development.
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True |
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Brittle stars employ a unique evasive technique that involves detaching an arm if grabbed by a predator.
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True |