Ch. 12 Introduction to animals

Last update by jaylahfleming2 on 08/28/2012
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List the 6 characteristics of animals.

Answer:
1. They are many-celled

2. Animal cells have a nucleus and organelles

3. Animals depend on other living things in the environment for food.

4. Animals Digest their food

5. Animals move from place to place

6. They can produce sexually and assexually

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  • cg allen
    you have to know how to do the definitions first

    Define:

    Adaptation

    Herbivore

    Carnivore

    Omnivore

    Detritus

    Adaptation:
    Any sturucture, process, or behavior that helps and organism survive in its environment

    Herbivore:
    A plant eater

    Carnivore:
    Meat eater

    Omnivore:
    Animals that heat both plants and animals

    Detritus:
    tiny bits of decaying matter that many beetles and animals like millipedes feed on
    (p.331)

  • cg allen
    Define:
    Mimicry

    Camouflage

    Vertebrate

    Invertebrate

    Demonstate and Define:

    Asymmetrical Symetry

    Bilateral Symetry

    Radial Symetry

    Mimicry:
    An adaptation in which one animal closely resembles another animal in appearance or behavior.

    Camouflage:
    an adaptation that causes an animal to blend in with its surroundings

    Vertebrate:
    An animal with a backbone

    Invertebrate:
    An animal without a backbone

    Asymetrical:
    An animal that has no definite shape

    Radial Symetry:
    Animals with body parts arranged in a circle around a center point
    (Bicycle Wheel)

    Bilateral Symetry:
    An animal that can be folded in half and have about the same thing on both sides

  • cg allen
    Name eight invertebrates.

    Invertebrates:

    -
    Sponges
    -Cnidarians
    -Flatworms
    -Roundworms
    -Mollusks
    -Annelids
    -Arthropods
    -Echinoderms

  • cg allen

    Define:

    Sessile

    Pores

    Spicules

    Hermaphrodites

    Tentacle

    Stinging cell


    Spicules:
    Organisms that remain attached to one place during their lifetime

    Pores:
    Small openings in the sponge's body which water goes through

    Sessile:
    Sharp, pointed structures that sponge's body contains

    Hermaphrodites:

    Produce both egg and sperm


    Tentacle:
    Arm-like structures

    Stinging Cells:
    have a capsule with a coil, threadlike structure that helps the cnidarian capture food.
  • cg allen
    How do these animals feed and reproduce?

    Sponges

    Flatworms

    Roundworms

    Cnidarians
    Sponges:
    They are filter feeders and have digestion that's intracellular
    They are hermaphrodites, but cannot fertilize their own eggs. They use internal fertilization. For asexual reproduction they use regeneration and budding.

    Cnidarians:
    Gastrovascular Cavity of two tissue layers and are preditors.
    The polyp reproduces by budding. The medusa reproduceswhen the larva grow into a polyp. (Sexual) They boith have external fertilization

    Flatworms:
    They are carnivores and use the Gastrovascular cavity along with the mouth.
    They reproduce asexually by fission and sexual (external) because they are hermaphrodites.

    Roundworms:
    They are carnivores and use a Pseudo-coelom (False Digestive tract). They are the first organism we have studied with 2 openings. (Mouth&anus). They are also refered to as a "tube within a tube".
    Separate sexes (Male and female) and they do internal fertilization. (Kendall Phineas and Ferb is all I have to say here :)
  • cg allen
    Name the characteristics:

    Sponges

    Flatworms

    Roundworms

    Cnidarians

    Sponges:
    They are invertebrates, have asymmetrical symetry, have a Central Cavity with pores and colar cells, have speiles/sponging for protection and support, and they have no organs or organ systems.

    Cnidarians:
    (Hydras, Jellyfish, Corals, Sea Anemones, Portuguese man-of-wars) They are invertebrates, have radial symetry,have one body opening, and two forms of itself: Polyp (Vase shaped) and medusa (bell shaped). [they also have a nerver net and tentacles with stinging cells]

    Flatworms:
    They are invertebrates that can be free-living or parasetic. They have bilateral symetry and soft bodies (Flat of course).

    Roundworms:
    They are invertebrates, slender, and have an unsegmented body with 3 tissue layers. (Soft body)

  • cg allen

    What is the importance of Coral?

    Define:

    Free-living Organism

    Parasetic Organism

    Planarian

    Fluke

    Tapeworms

    First of all, Coral live in salt water and tropical seas near the shoreline
    -They provide a protective habitat
    -They protect the shoreline
    -They provide a productive eco-system
    -they're indicators of potroleum
    -Scientists are currently studying them to try to find cures for cancer

    Free-living organism:
    An organism that doesn't depend on another for food

    Parasetic organism:
    An organism that depends on another organism for food

    Planarian:
    A free-living flatworm with a triangular head and eyespots. It has bilateral symetry and cilia that cover it. (it has a mucous that spreads whenever it moves)

    Flukes:
    A parasite with a complex life cycle that causes schistosomiasis. (See p.345)

    Tapeworms:
    A parasite flatworm that attaches itself to the intestine of a host organism. An immature one is called a bladder worm.

    Anus:
    An opening at the end of the digestive tract through which wastes leave the body

  • cg allen
    Why were sponges classified as plants and now are animals?

    Commpare and contrast free-living and parasetic.

    Free-living vs. parasetic:
    Free-living organisms do not depend on any other organism to provide food or shelter for them. Parasetic organisms depend on a host or another organism to provide food and a home for them to live in.

    Plants->Animals:
    Scientist classified them as plants originally because they couldn't move. Because microscopes improved, scientist discovered that sponges could not make their own food and so they classified them as animals.
Ch  12 Introduction to animals
Ch. 12 Introduction to animals
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