Which of the following cell structures of a sponge do not match its function?
Collar cells â calcareous structures for support
Osculum â opening through which water leaves
Pore cells â opening through which water enters
Spongin â fibers for support
Gametes â reproduction
Sponges and all filter feeders use which of the following as a food source?
All particulate matter suspended in water
Particulate matter that deposits on the bottom
Dead plankton only
Plant matter in the water
A larva is best defined as which of the following?
Immature stage that is able to reproduce
Early colony of cells of fresh-water sponges
Early stage of development of an organism, typically part of the plankton
Sperm cell that lives free in the water
Egg that has been fertilized by more than one sperm
Cnidarians share all of these features except which of the following?:
Complete digestive tract with mouth and anus
Marine and fresh-water
Most cnidarians are specialized as
feeders of organic matter on the bottom.
Statocysts are structures used in
Which of the following surfaces is not found in bilaterally symmetrical animals?
The development of bilateral symmetry in invertebrates has particularly influenced the evolution of a more complex
Deposit-feeding animals feed on
blood and living tissues.
particulate matter in the water.
plankton from the water that passively enters the digestive system.
organic matter that settles on the bottom.
have a soft body often covered by a shell made of silica.
have a soft body covered by a mantle.
have an externally segmented body.
lack a larval stage.
lack a circulatory system.
The radula and crystalline style of molluscs are part of the
Which of the following is a distinctive feature of arthropods?
Lack of a digestive system
Gills in a mantle cavity
Proboscis used to capture prey
Lack of a brain
Nematocysts are _______________ found in_______________.
feeding structures; sponges
reproductive structures; all invertebrates
stinging cells; cnidarians
cells for sight; mollusks
such as oysters, often secrete smooth material over rough impurities
inside of the shell. The structure that results is a _____________.
grain of sand
piece of coral
The vestigial internal shell of a squid is called the _______________.
Which of the following animals has a beak?
The compound eye of a lobster sees_______________.
colors but not shapes of objects
a complete image with each section of the eye
in black and white
one image for the entire eye
close up â but not at a distance
Which of the following is not an echinoderm?
An adult sea star is said to be secondarily radially symmetrical because ________________.
every other animal has bilateral symmetry
the larva is bilaterally symmetrical
as a larva the animal is also radially symmetrical
as arms grow the animal changes symmetry
if an arm is lost a new arm can grow in its place
If a fisherman wishing to get rid of sea stars chops arms off each that he finds, eventually
all sea stars in the area will have no arms.
no sea stars will be found in the area.
sea stars will eat all of the fish that the fisherman doesn’t catch.
there will be more sea stars in the area.
the bottom of the ocean will be littered with sea star arms.
Copepods occupy what niche in a marine ecosystem?
Are low on the food chain and are planktonic
Are predators that feed on small fish
Roam the bottom of the ocean searching for detritus
Latch onto the bodies of whales and sea turtles
Make up most of periodic red tides
of the following lifestyle patterns would most benefit from organisms
being hermaphroditic? Animals that _________________.
never learned how to reproduce
change their sex at different stages in their life cycle
are social and live in large groups
can only feed at night
don’t come in contact with others of the same species very often
The tube feet of a sea star operate as part of the ___________________.
water vascular system
molting process from larva to adult
A sea cucumber confuses predators by ________________________.
moving one way and then quickly changing directions
jumping above the level the predator can reach
leaving its intestines behind
squirting out ink from an internal ink sac
making itself look much larger than it really is
Which of the following animals is the closest evolutionarily to land animals?