Transcript Chapter 27 Review

Chapter 27 Review
Mollusks and Annelids
Charles Page High School
Dr. Stephen L. Cotton
Chapter 27 Review
Mollusks and Annelids
The
gills of a clam are located in
the mantle
The shell of a mollusk consists of
calcium carbonate produced by
glands in the mantle
Mollusks that are carnivorous
drill through the shells of other
animals by means of the radula
Chapter 27 Review
Mollusks and Annelids
In
oysters, the mixture of food
and mucus is moved to the
mouth by cilia on gills
What type of circulatory system
does an oyster have? open
Land snails and slugs breathe by
means of specially adapted
mantle cavity
Chapter 27 Review
Mollusks and Annelids
Compared
with other mollusks,
the cephalopods have more
complex brains.
In a cephalopod, the foot is
divided into tentacles
The land slug is believed to have
evolved from a shelled ancestor
Chapter 27 Review
Mollusks and Annelids
The
group of bivalves that
burrow into sand and mud
includes the clam
Adult bivalves that can move
around by flapping their shells
are scallops
Nautiluses remain upright and
float in water by means of gases
Chapter 27 Review
Mollusks and Annelids
The
“termites of the sea” are
actually shipworms
Mollusks are, or have been,
used for food, medicine,
environmental indicators, money
What is the first organ through
which food travels in an
earthworm? pharynx
Chapter 27 Review
Mollusks and Annelids
Near
the front end of an
earthworm, the ring vessels that
contract rhythmically are known
as heart or aortic arches
Like many marine annelids,
earthworms have sensory cells
located in the skin
Chapter 27 Review
Mollusks and Annelids
How
does an earthworm
become shorter? By contracting
its longitude muscles
The group of annelids that
protect themselves by tufts of
poisonous bristles that break off
and penetrate the skin of the
attacker include the fireworm
Chapter 27 Review
Mollusks and Annelids
In
mollusks, ammonia is
removed from the blood and
released from the body through
nephridia
In the South Pacific, many
annelids that swarm at the
surface to release eggs at the
same time are paloloworms
Chapter 27 Review
Mollusks and Annelids
Describe
the process of
reproduction in earthworms.
–
They link and exchange sperm and some other stuff happens
Which
term is least closely
related to the others: tubifex
worms; earthworm; oligochaete;
polychaete
What is found in the castings of
earthworms? waste
Chapter 27 Review
Mollusks and Annelids
Most
leeches are organisms that
exist as external parasites
By grinding and partially
digesting incredible amounts of
soil, earthworms speed the
return to plants of nitrogen
Ocean plankton consists of
many very small polycheates
Chapter 27 Review
Mollusks and Annelids
Once
the skin of a host has been
penetrated, a leech sucks blood
from the area by using it’s
pharynx
The cephalopod whose internal
shell is either thin and coiled, or
flat and plate-like is the cuttlefish
Chapter 27 Review
Mollusks and Annelids
Some
nudibranchs protect
themselves by bright colors
In mollusks, cellular metabolism
produces nitrogen-containing
wastes in the form of ammonia
An organism that has both male
and female reproductive organs
is called a hermaphrodite
Chapter 27 Review
Mollusks and Annelids
Some
hermaphroditic mollusks,
such as certain snails, switch
from one sex to another.
Current investigations of
mollusks are based on the fact
that they never develop cancer
Chapter 27 Review
Mollusks and Annelids
Brightly-colored
gills protrude
from the worm’s tube in feather
duster worms.
Most tube-dwelling annelids
have light sensitive cells that
allow the animal to detect
shadows of predators passing
ovehead.
Chapter 27 Review
Mollusks and Annelids
One
reason soil deteriorates
when poisons are used to kill
insects is that useful organisms
are also killed.
During feeding, a leech may
swallow up to ten times it’s
weight in blood.
Chapter 27 Review
Mollusks and Annelids
A leech
usually attaches itself to
it’s host by the anterior sucker.
The teeth of the radula have
evolved into long, hollow darts
attached to poison glands in
snails known as cone shells