BIOL 2251 All HW Questions With Accurate Answers
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Terms in this set (183)
The free-swimming larva of parenchymula
most sponges is a
A. bud.
B. gemmule.
C. apopyle.
D. parenchymula.
E. plasmodium.
The simplest of canal asconoids
systems is found in the
A. asconoids.
B. leuconoids.
C. syconoids.
The minute, needle-like Spicules
structures that act as a
skeletal support system in
sponges are called
_________________.
The most complex and the leuconoids
most common body form
of sponges is found in the
A. asconoids.
B. leuconoids.
C. syconoids.
,Cells that move about in A. archaeocytes.
the mesohyl, digest
particles, and may
specialize for other
functions are the
A. archaeocytes.
B. pinacocytes.
C. choanocytes.
D. spongocytes.
E. lophocytes.
a sponge feeds by beating the flagella of collar cells to form a current;
food is absorbed by collar cells.
A. using a net and a current
that sweeps food particles
through it.
B. squeezing the
spongocoel cavity to suck
debris in and out through
the osculum.
C. beating the flagella of
collar cells to form a
current; food is absorbed
by collar cells.
D. beating the flagella of
collar cells to form a
current from osculum to
pores; food is engulfed by
amoebocytes in the central
cavity of the sponge.
Calcareous or siliceous spicules
elements of the sponge
body wall provide support.
These elements are called
The water outlet in sponges osculum
is known as a/an
__________________.
,True or False: false
Because sponges lack the
tissue level of organization
symbiotic relationships
between sponges and
other creatures are
unimportant.
About 80% of the sponges Demospongiae
belong to the class __________.
Which is NOT a trait of Water enters through the osculum
sponges?
A. They are sessile filter
feeders
B. Their body wall has two
incipient "cell layers"
C. Their flagellated collar
cells move water
D. Water enters through the
osculum
E. Amoeboid cells digest
food and make skeletal
fibers and gametes
The order in which a drop ostia-spongocoel-osculum
of ink would pass by the
structures in an ascon
sponge is
True or False: Chemical True
secretions, produced as
sponges and bacteria live
in symbiotic relationships,
are proving important as
therapies for human
disease.
, The traditional view of two germ layers, ectoderm and endoderm
Cnidarians relative to germ
layers is that Cnidaria
possess
A. only one germ layer, the
ectoderm, that
differentiates into the two
tissue layers.
B. two germ layers,
ectoderm and mesoderm.
C. two germ layers,
endoderm and mesoderm.
D. two germ layers,
ectoderm and endoderm.
E. definitely all three germ
layers including the
mesoglea as it is derived
from ectoderm.
The correct sequence in C. planula,, scyphistoma, ephyra
the life cycle of the jellyfish
Aurelia is
A. planula, ephyra,
scyphistoma.
B. scyphistoma, planula,
ephyra.
C. planula, scyphistoma,
ephyra.
D. ephyra, planula,
scyphistoma.
E. None of the choices are
correct.
Save
Terms in this set (183)
The free-swimming larva of parenchymula
most sponges is a
A. bud.
B. gemmule.
C. apopyle.
D. parenchymula.
E. plasmodium.
The simplest of canal asconoids
systems is found in the
A. asconoids.
B. leuconoids.
C. syconoids.
The minute, needle-like Spicules
structures that act as a
skeletal support system in
sponges are called
_________________.
The most complex and the leuconoids
most common body form
of sponges is found in the
A. asconoids.
B. leuconoids.
C. syconoids.
,Cells that move about in A. archaeocytes.
the mesohyl, digest
particles, and may
specialize for other
functions are the
A. archaeocytes.
B. pinacocytes.
C. choanocytes.
D. spongocytes.
E. lophocytes.
a sponge feeds by beating the flagella of collar cells to form a current;
food is absorbed by collar cells.
A. using a net and a current
that sweeps food particles
through it.
B. squeezing the
spongocoel cavity to suck
debris in and out through
the osculum.
C. beating the flagella of
collar cells to form a
current; food is absorbed
by collar cells.
D. beating the flagella of
collar cells to form a
current from osculum to
pores; food is engulfed by
amoebocytes in the central
cavity of the sponge.
Calcareous or siliceous spicules
elements of the sponge
body wall provide support.
These elements are called
The water outlet in sponges osculum
is known as a/an
__________________.
,True or False: false
Because sponges lack the
tissue level of organization
symbiotic relationships
between sponges and
other creatures are
unimportant.
About 80% of the sponges Demospongiae
belong to the class __________.
Which is NOT a trait of Water enters through the osculum
sponges?
A. They are sessile filter
feeders
B. Their body wall has two
incipient "cell layers"
C. Their flagellated collar
cells move water
D. Water enters through the
osculum
E. Amoeboid cells digest
food and make skeletal
fibers and gametes
The order in which a drop ostia-spongocoel-osculum
of ink would pass by the
structures in an ascon
sponge is
True or False: Chemical True
secretions, produced as
sponges and bacteria live
in symbiotic relationships,
are proving important as
therapies for human
disease.
, The traditional view of two germ layers, ectoderm and endoderm
Cnidarians relative to germ
layers is that Cnidaria
possess
A. only one germ layer, the
ectoderm, that
differentiates into the two
tissue layers.
B. two germ layers,
ectoderm and mesoderm.
C. two germ layers,
endoderm and mesoderm.
D. two germ layers,
ectoderm and endoderm.
E. definitely all three germ
layers including the
mesoglea as it is derived
from ectoderm.
The correct sequence in C. planula,, scyphistoma, ephyra
the life cycle of the jellyfish
Aurelia is
A. planula, ephyra,
scyphistoma.
B. scyphistoma, planula,
ephyra.
C. planula, scyphistoma,
ephyra.
D. ephyra, planula,
scyphistoma.
E. None of the choices are
correct.
