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33 Cards in this Set
- Front
- Back
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What are invertebrates?
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Animals without a backbone.
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What are animals that only eat meat?
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carnivores
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What are animals that eat plants and meat?
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omnivores
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What are animals that only eat plants?
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herbivores
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What organisms do not need other organisms for food or shelter?
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free-living organisms
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What is it called when body parts are arranged around a central point?
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radial symmetry
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What are animals with a backbone?
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vertebrates
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What is it called when body parts are arranged in a similar way on both sides?
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bilateral symmetry
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What is it called when an organism has no shape?
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asymmetrical
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What are organisms that remain attached to one place during their lifetimes called?
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sessile
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What is an adaptation in which one animal closely resembles another animal?
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mimicry
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What organism have asymmetrical form?
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Most sponges
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What are pores?
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Many small openings that cover the body of a sponge.
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What help move water through a sponge?
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spongin
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What are spicules?
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Sharp structures on the bodies of many sponges.
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What kind of feeder is a sponge?
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filter feeder
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What animal has both a mouth and anus?
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roundworm
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How do sponges and cnidarians reproduce?
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asexually and sexually
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Where do most cnidarians live?
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oceans
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What body form do cnidarians have?
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radial symmetry
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What body form do flatworms and roundworms have?
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bilateral symmetry
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What organism lacks a digestive system?
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tapeworms
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What is an example of a sessile organism?
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sponge
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What are the characteristics of animals?
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made up of many cells,eukaryotic cells, cannot make their own food,
digest their food, many can move, capable of reproduction |
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What characteristic do all animals have?
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digest their food
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What is an example of a cnidarian?
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jellyfish
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How do sponges reproduce sexually?
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budding
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Which group do roundworms belong to?
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nematodes
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What are the two body forms of cnidarians?
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medusa and polyp
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What armlike structures surround the mouths of most jellyfish?
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tentacles
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How do polyps reproduce?
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Asexually by budding
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How do medusa reproduce?
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Sexually by egg and sperm
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Why do scientists think the medusa stage was the first stage of the cnidarians?
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Because the polyp stage develops from the medusa.
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