1p|pP a g e
Brooks Biodiversity Unit 3 Exam | 400
Multiple-Choice Questions and Answers
with Detailed Explanations | Plant &
Animal Biology Study Guide |
Guaranteed Pass
Phylum Porifera .............ANSWER .........Sponges
p p p
Parazoans-poorly defined tissues p p
Metazoa .............ANSWER .........multicellular animals
p p p
Phylum Porifera- p
General characteristics .............ANSWER .........Sponges
p p p p
- Sessile
p p
- Filter water through canal system
p p p p p p p
- Mostly marine
p p
,2p|pP a g e
Phylum Porifera (sponges)-
p p
body plans .............ANSWER .........body plans
p p p p p p
- Asconoid-body bag
p p
-Syconoid-body wall forms
p p p
- Leuconoid-most complicated
p p
Asconoid .............ANSWER .........Sponge body plan
p p p p
Bag shape
p
most simple p
Phylum Porifera (sponges)-
p p
General morphology .............ANSWER .........-Body layers
p p p p p
- Outer:
p p
- Porocytes
p p
- Myocytes
p p
- Middle (Mesohyl)
p p p
,3p|pP a g e
-Spicules
- Spongin
p
- Amoebocytes
p
- Collencytes
p
p
- Inner
p
"Choanocytes"
Phylum Porifera (sponges)-outer body layers .............ANSWER .........-
p p p p p p
Porocytes: specialized pore cells
p p p p
- Myocytes: muscle-like cells
p p p p
Phylum Porifera (sponges)-middle body layers .............ANSWER .........-
p p p p p p
Spicules: provide support
p p
- Spongin: protein compound that gives spongy feel
p p p p p p p
-
Amoebocytes: similar to stem cells that produce spicules and spongi
p p p p p p p p p p
n
, 4p|pP a g e
- Collencytes(nerve-
p
like cells): useful for structure. look like neurons and believe to have a
p p p p p p p p p p p p
precursor to a nervous system
p p p p p
Collencytes .............ANSWER .........Phylum Porifera (sponges)-
p p p p
middle body layer p p
(nerve-
like cells): useful for structure. look like neurons and believe to have a
p p p p p p p p p p p p
precursor to a nervous system
p p p p p
Do sponges have a nervous system? .............ANSWER .........No
p p p p p p p
Phylum Porifera (sponges)- p p
inner body layers .............ANSWER ........."Choanocytes":
p p p p p
cells that can trap particles and water into the cell. -
p p p p p p p p p p
Morphologically similar to the choanoflagellate. p p p p
Do sponges have muscles? .............ANSWER .........No
p p p p p
Brooks Biodiversity Unit 3 Exam | 400
Multiple-Choice Questions and Answers
with Detailed Explanations | Plant &
Animal Biology Study Guide |
Guaranteed Pass
Phylum Porifera .............ANSWER .........Sponges
p p p
Parazoans-poorly defined tissues p p
Metazoa .............ANSWER .........multicellular animals
p p p
Phylum Porifera- p
General characteristics .............ANSWER .........Sponges
p p p p
- Sessile
p p
- Filter water through canal system
p p p p p p p
- Mostly marine
p p
,2p|pP a g e
Phylum Porifera (sponges)-
p p
body plans .............ANSWER .........body plans
p p p p p p
- Asconoid-body bag
p p
-Syconoid-body wall forms
p p p
- Leuconoid-most complicated
p p
Asconoid .............ANSWER .........Sponge body plan
p p p p
Bag shape
p
most simple p
Phylum Porifera (sponges)-
p p
General morphology .............ANSWER .........-Body layers
p p p p p
- Outer:
p p
- Porocytes
p p
- Myocytes
p p
- Middle (Mesohyl)
p p p
,3p|pP a g e
-Spicules
- Spongin
p
- Amoebocytes
p
- Collencytes
p
p
- Inner
p
"Choanocytes"
Phylum Porifera (sponges)-outer body layers .............ANSWER .........-
p p p p p p
Porocytes: specialized pore cells
p p p p
- Myocytes: muscle-like cells
p p p p
Phylum Porifera (sponges)-middle body layers .............ANSWER .........-
p p p p p p
Spicules: provide support
p p
- Spongin: protein compound that gives spongy feel
p p p p p p p
-
Amoebocytes: similar to stem cells that produce spicules and spongi
p p p p p p p p p p
n
, 4p|pP a g e
- Collencytes(nerve-
p
like cells): useful for structure. look like neurons and believe to have a
p p p p p p p p p p p p
precursor to a nervous system
p p p p p
Collencytes .............ANSWER .........Phylum Porifera (sponges)-
p p p p
middle body layer p p
(nerve-
like cells): useful for structure. look like neurons and believe to have a
p p p p p p p p p p p p
precursor to a nervous system
p p p p p
Do sponges have a nervous system? .............ANSWER .........No
p p p p p p p
Phylum Porifera (sponges)- p p
inner body layers .............ANSWER ........."Choanocytes":
p p p p p
cells that can trap particles and water into the cell. -
p p p p p p p p p p
Morphologically similar to the choanoflagellate. p p p p
Do sponges have muscles? .............ANSWER .........No
p p p p p
