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Types of Invertebrates

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  • Which of the following statement is incorrect about worms and mollusks?
    All worms and mollusks are segmented.
    Worms and mollusks are invertebrates.
    All worms and mollusks rely on other organisms for food.
    Worms and mollusks both have soft bodies.
  • How many body parts do arachnids usually have?
    2 body parts and 6 legs
    2 body parts and 8 legs
    3 body parts and 6 legs
    3 body parts and 8 legs
  • Legs and wings connect to the thorax.
    False
    True
  • Both insects and arachnids have an exoskeleton.
    False
    True
  • Which two body parts are joined in an arachnid?
    the head and legs
    the thorax and legs
    the head and thorax
    the head and antennae
  • Worms and mollusks are similar because they both have:
    hard shells
    lungs
    backbones
    soft bodies
  • A grasshopper has three body parts and no backbone. It is:
    an arachnid
    an abdomen
    an insect
    a vertebrate
  • Krissy finds a bug in her backyard. It has two body parts and eight legs. Krissy has found:
    an insect
    a grasshopper
    a vertebrate
    an arachnid
  • A ladybug is an insect because it has __________ .
    two abdomens
    two body parts
    six legs
    eight legs
  • Do arachnids have wings?
    Yes
    No
  • What are the three body parts of an insect?
    the head, legs, and wings
    the head, legs, and antennae
    the head, thorax, and abdomen
    the head, abdomen, and legs
  • Worms have bodies which are divided into _________.
    vertebrates
    segments
    bones
  • The insect group is one of the largest invertebrate groups.
    False
    True
  • Which mollusks live in the water?
    insects and clams
    worms and mollusks
    mollusks and sharks
    clams and oysters
  • What is the purpose of the exoskeleton?
    It gives the animal shape.
    It protects the insect's internal organs.
    All of the above
  • Animals that do not have a backbone are called __________ .
    invertebrates
  • Which part of the insects body holds the organs?
    the thorax
    the hean
    the legs
    the abdomen
  • How are insects and arachnids similar?
    They both are unicellular.
    They both have exoskeletons.
    They both need the Sun for photosynthesis.
    They both are found only in water.
  • Most mollusk cannot grow hard shell.
    False
    True
  • Insects go through a process called metamorphosis. What is metamorphosis?
    This special process is a change in body structure.
    All of the above
    The special process of growing wings.
    The process of eating.
  • Why can worms keep living even if one segment is hurt?
    None of the above
    Because they have no vertebrate.
    Because they have an exoskeleton.
    Because each segment has copies of important organs.
  • Which part of the insects body holds the eyes, mouth parts, and antennae?
    the head
    the thorax
    the abdomen
    the legs
  • The thorax is located between ________________.
    the antennae and the head
    the antennae and abdomen
    the head and the abdomen
  • Insect organs are found in the:
    thorax
    abdomen
    antennae
    head
  • Why do most mollusks grow hard shells?
    to protect themselves
    to live in them
    all of the above
    to store food
  • Animals that do not have vertebrae are called __________ .
    invertebrates.
  • Which of the following statements is true?
    Clams and oysters live on land.
    Octopi are not very smart.
    Not all mollusks have shells.
    Worms have hard outer shells.
  • If part of a worm is hurt it may keep living. This is because the worm's body:
    has a hard shell
    all of the above
    has an internal skeleton
    is made of segments
  • Earthworms belong to a group on invertebrate called?
    worms
    annelids
    soft bodies
    mollusk
  • Some mollusk species live in water, while others live on land.
    False
    True
  • The number of invertebrates on earth is much greater than the number of vertebrates.
    True
    False
  • What are the the places worms live in?
    under the ground, in water, or inside animals
    in water, or inside animals, and in clams
    in food, in water, or inside animals
    under the ground, in food, or inside animals
  • How many legs to insects have?
    20
    6
    3
    8
  • Squid and octopi are examples of mollusk with _________.
    swimming abilities
    shells
    no shells
  • Which of the following is a mollusk?
    oyster
    snail
    all of the above
    squid
  • Spiders and scorpions are examples of __________.
    arachnid
    insects
  • Worms have no protective structure.
    False
    True
  • Clams and oysters use gills to breathe and cannot live on land.
    False
    True
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