Chapter 27 Review Mollusks and Annelids

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Chapter 27 ReviewMollusks and Annelids

• Charles Page High School
• Dr. Stephen L. Cotton

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Chapter 27 ReviewMollusks and Annelids

• The gills of a clam are located in the__________.
• The shell of a mollusk consists of calcium
  carbonate produced by glands in the _________.
• Mollusks that are carnivorous drill through the
  shells of other animals by means of ________.

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Chapter 27 ReviewMollusks and Annelids

• In oysters, the mixture of food and mucus is
  moved to the mouth by _____.
• What type of circulatory system does an oyster
  have?
• Land snails and slugs breathe by means of
  specially adapted ___.

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Chapter 27 ReviewMollusks and Annelids

• Compared with other mollusks, the cephalopods
  have ______ brains.
• In a cephalopod, the foot is divided into ______.
• The land slug is believed to have evolved from a
  ________.

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Chapter 27 ReviewMollusks and Annelids

• The group of bivalves that burrow into sand and
  mud includes the _______.
• Adult bivalves that can move around by flapping
  their shells are ______.
• Nautiluses remain upright and float in water by
  means of ____.

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Chapter 27 ReviewMollusks and Annelids

• The termites of the sea are actually ________.
• Mollusks are, or have been, used for ________.
• What is the first organ through which food
  travels in an earthworm?

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Chapter 27 ReviewMollusks and Annelids

• Near the front end of an earthworm, the ring
  vessels that contract rhythmically are known as
  _______.
• Like many marine annelids, earthworms have
  sensory cells located in the ________.

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Chapter 27 ReviewMollusks and Annelids

• How does an earthworm become shorter?
• The group of annelids that protect themselves by
  tufts of poisonous bristles that break off and
  penetrate the skin of the attacker include the
  _____.

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Chapter 27 ReviewMollusks and Annelids

• In mollusks, ammonia is removed from the blood
  and released from the body through ______.
• In the South Pacific, many annelids that swarm at
  the surface to release eggs at the same time are
  _______.

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Chapter 27 ReviewMollusks and Annelids

• Describe the process of reproduction in
  earthworms.
• Which term is least closely related to the
  others tubifex worms earthworm oligochaete
  polychaete
• What is found in the castings of earthworms?

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Chapter 27 ReviewMollusks and Annelids

• Most leeches are organisms that exist as _______.
• By grinding and partially digesting incredible
  amounts of soil, earthworms speed the return to
  plants of ______.
• Ocean plankton consists of many very small
  _______.

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Chapter 27 ReviewMollusks and Annelids

• Once the skin of a host has been penetrated, a
  leech sucks blood from the area by using its
  ____.
• The cephalopod whose internal shell is either
  thin and coiled, or flat and plate-like is the
  ____.

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Chapter 27 ReviewMollusks and Annelids

• Some nudibranchs protect themselves by ________.
• In mollusks, cellular metabolism produces
  nitrogen-containing wastes in the form of ______.
• An organism that has both male and female
  reproductive organs is called a _______.

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Chapter 27 ReviewMollusks and Annelids

• Some hermaphroditic mollusks, such as certain
  _____, switch from one sex to another.
• Current investigations of mollusks are based on
  the fact that they never develop _____.

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Chapter 27 ReviewMollusks and Annelids

• Brightly-colored _____ protrude from the worms
  tube in feather duster worms.
• Most tube-dwelling annelids have _______ cells
  that allow the animal to detect shadows of
  predators passing ovehead.

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Chapter 27 ReviewMollusks and Annelids

• One reason soil deteriorates when poisons are
  used to kill insects is that useful ____ are also
  killed.
• During feeding, a ____ may swallow up to ten
  times its weight in blood.

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Chapter 27 ReviewMollusks and Annelids

• A leech usually attaches itself to its host by
  the _____ sucker.
• The teeth of the radula have evolved into long,
  hollow darts attached to poison glands in snails
  known as ______.