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phylum porifera

Total questions: 43

Worksheet time: 21mins

Name
Class
Date
1.

The largest opening in a sponge through which water is expelled.

a)

porocyte

b)

Osculum

c)

Spongocoel

d)

Amoebocyte

2.

Water enters the sponge through the

a)

porocyte

b)

Osculum

c)

Spongocoel

d)

Amoebocyte

3.

Most sponges are

a)

predators

b)

herbivores

c)

filter feeders

d)

prey

4.

Water enters the sponge through pores called ostia or ________s.

a)

spongoceol

b)

excurrent pore

c)

osculum

d)

porocyte

5.

Identify the spongoceol

a)

1

b)

2

c)

3

d)

4

6.

Sponges are

a)

always motile

b)

always sessile

c)

only sessile during their larval phase

d)

sessile as adults, but motile as larvae

7.

Reproduction in sponges can be asexual or sexual.  Which of the following is NOT asexual?

a)

egg and sperm

b)

gemmules

c)

budding

d)

regeneration

8.

These sponges have spicules made of calcium carbonate

a)

Class Calcarea

b)

Class Hexactinellida

c)

Class Demospongea

d)

Class Porifera

9.

These are flat cells that line the outside of the sponge.  Porocytes are modified ____________.

a)

pinacocytes

b)

archeocytes/amoebocytes

c)

choanocytes/collar cells

d)

spicules

10.

These cells are called collar cells and have a flagella that controls current in the sponge.

a)

pinacocytes

b)

archeocytes/amoebocytes

c)

choanocytes

d)

spicules

11.

This cell generates the current in the sponge.

a)

choanocyte

b)

porocyte

c)

mesohyl

d)

osculum

12.

(Epidermal cell) line the exterior of the sponge.

a)

ostium

b)

spicule

c)

Osculum

d)

pinacocyte

13.

_______ cells move through the mesohyl carrying nutrients to all of the other cells in the sponge body.

a)

amoebocyte

b)

porocyte

c)

mesohyl

d)

osculum

14.

Cells which carry nutrients to other parts of the sponge

a)

archaeocytes/amoebocytes

b)

choanocytes

c)

pinacocytes

d)

Spongocoel

15.

Name for the pores on a sponge

a)

Ostia/Porocytes

b)

Mesohyl

c)

Choanocytes

d)

Osculum

16.

Skeleton type of flexible protein fibers

a)

Spicules

b)

Spongin

c)

Spongocoel

d)

Mesohyl

17.

Hollow center of the sponge

a)

Spicules

b)

Spongin

c)

Spongocoel

d)

Mesohyl

18.

Jelly like matrix within the sponge

a)

Spicules

b)

Spongin

c)

Spongocoel

d)

Mesohyl

19.

Identify the asconoid sponge

a)

Left

b)

middle

c)

right

20.

Identify the syconoid sponge

a)

Left

b)

middle

c)

right

21.

Identify the leuconoid sponge

a)

Left

b)

middle

c)

right

22.

Where is Phylum Porifera mostly found

a)

marine waters

b)

river waters

c)

lake waters

d)

pond waters

23.

How can phylum porifera be reproduced?

a)

Asexually only

b)

Sexually only

c)

Both asexually and sexually

24.

How does Phylum Porifera do respiration?

a)

Exchange of gas through blood

b)

Diffusion of water through its skin membrane

c)

Through the gills

25.

Name of D (opening at top)

a)

Osculum

b)

Ostia

c)

Choanocytes

d)

Incurrent Pore

26.

Water exits the sponge here

a)

A

b)

B

c)

C

d)

D

27.

Flagella inside a sponge keep water moving through its body. Why is this necessary?

a)

It prevents the sponge from floating away

b)

It allows the sponge to feed

c)

It allows the sponge to absorb carbon dioxide

d)

It maintains the water pressure inside the sponge

28.
Most sponges are hermaphrodites.  What does this mean?
a)
sponges can produce their own food
b)
sponges can produce both eggs and sperm
c)
sponges cannot reproduce
d)
sponges can swim around
29.
What is the name of the phylum sponges belong to?
a)
mammals
b)
chordate
c)
cnidarians
d)
Porifera
30.
___________ are tiny hard particles that give a sponge support and can provide protection when they stick out of a sponge.
a)
spongin
b)
bones
c)
buds
d)
spicules
31.
Sponges have many pores or ______ to circulate water. 
a)
osculum
b)
holes
c)
ostia
d)
spongin
32.
cells have sticky, funnel-shaped collar to collect food particles and a flagellum that creates a water current
a)
amoebocyte
b)
ostiocyte
c)
pinacocyte
d)
choanocyte
33.

How do sponges obtain food?

a)

filter it from the water

b)

grasp it with tentacles

c)

pry it apart with tube feet

d)

put it in their mouth with jointed legs

34.

The cells inside the sponge that have flagella (and absorb food) are called...

a)

Collar cells

b)

Flagella

c)

Osculum

d)

Pores

35.

Structure C is a

a)

choanocyte

b)

amoeboid cell

c)

spicule

d)

pinacocyte

36.
Choanocytes are also known as _____.
a)
epithelial cells
b)
amoeboid cells
c)
collar cells
d)
pore cells
37.

What moves water through the sponge?

a)

Collar cell

b)

Flagella

c)

Porocyte

d)

Amebocyte

38.
Which part of the sponge body is the central cavity that leads to the osculum?
a)
Ostia
b)
Mesenchyme
c)
Spongocoel
d)
Osculum
39.
Asexual sponge reproduction where a piece of the adult sponge breaks off and settles in a new area growing to adulthood.
a)
broadcast spawning
b)
branching
c)
budding
d)
forcast spawning
40.

Sponges have radial symmetry.

a)

True

b)

False

41.

The large opening at the top of the sponge is called the

a)

Osculum

b)

Porocyte

c)

Spicule

d)

Spongocoel

42.
Sponges get their food by 
a)
going through photosynthesis
b)
decomposing it
c)
sponges do not eat
d)
filter feeding
43.

Which of the following type of cell digests and distributes food for the sponge?

a)

Choanocytes

b)

Amoebocytes

c)

Endodermal cells

d)

Epidermal cells

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