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WorksheetsPorifera, Cnidaria, & Ctenophora
Total questions: 28
Worksheet time: 7hrs 46mins
Name
Class
Date
1.
You find a sponge and decide to look at it under a microscope. You see lots of spicules with 6 rays. You know right away that this sponge belongs to Class...
a)
Porifera
b)
Hexactinellida
c)
Demospongiae
d)
Calcarea
2.
A sponge whose skeleton is built from the spicules pictured would belong to what Class?
a)
Hexactinillida
b)
Demospongiae
c)
Calcarea
d)
Porifera
3.
A sponge from the Class Demospongiae is the only type of sponge that could have ________________ in it's skeleton.
a)
6 rayed spicules
b)
3-4 rayed spicules
c)
calcium carbonate spicules
d)
spongin
4.
Because sponges in the class Hexactinellidae have spicules made of silica, they are often given this name...
a)
Glass Sponges
b)
Silisponges
c)
Plastic Sponges
d)
Spongicas
5.
What group of animals are the simplest multicellular animals?
a)
Cnidarians
b)
Sponges
c)
Insects
6.
What does it mean when we say sponges are sessile?
a)
They don't move.
b)
They live in the sea.
c)
They filter feed.
d)
They are poor swimmers.
7.
The small pores in a sponge that water filters through are called ___________.
a)
Mesohyl
b)
Osculum
c)
Ostia
d)
Spicules
8.
The part of the sponge highlighted in pink is known as the ______________.
a)
Spongocoel
b)
Mesohyl
c)
Osculum
d)
Ostia
9.
The part of the sponge highlighted in pink is known as the ______________.
a)
Spongocoel
b)
Mesohyl
c)
Osculum
d)
Ostia
10.
The part of the sponge highlighted in pink is known as the ______________.
a)
Spongocoel
b)
Mesohyl
c)
Osculum
d)
Ostia
11.
The part of the sponge highlighted in pink is known as the ______________.
a)
Spongocoel
b)
Mesohyl
c)
Osculum
d)
Ostia
12.
A sponge is the ancestor of every animal species on Earth, according to what theory?
a)
Same Ancestor Theory
b)
One Ancestor Theory
c)
Ancestral Line Theory
d)
Relatability Theory
13.
Sponges can reproduce...
a)
Only asexually.
b)
Only sexually.
c)
Both asexually and sexually.
14.
When sponge sperm are released into the water by one individual and taken into the spongocoel of another sponge where they fertilize egg cells, _____________ fertilization has occurred.
a)
Internal
b)
Asexual
c)
External
d)
Passive
15.
When sponge sperm are released into the water by one individual and sponge eggs are released into the water by another sponge, the eggs can be fertilized in open water. This means that _____________ fertilization has occurred.
a)
Internal
b)
Asexual
c)
External
d)
Passive
16.
When light hits a jellyfish, it responds to the stimuli using its _______________.
a)
Brain
b)
Skin Cells
c)
Epidermis
d)
Nerve Net
17.
Organisms in Phylum Cnidaria and Phylum Ctenophora have what kind of symmetry?
a)
Asymmetry
b)
Bilateral
c)
Radial
d)
Colateral
18.
What trait gives jellies in the Phylum Ctenophora their common name?
a)
Box shape
b)
Combs
c)
Tentacles
d)
Polyps
19.
Which of the following is not a Class of Cnidarians?
a)
Hexactinellidae
b)
Anthozoa
c)
Scyphozoa
d)
Cubozoa
20.
What kingdom do jellyfish belong to?
a)
Cnidaria
b)
Animalia
c)
Scyphozoa
d)
Porifera
21.
When a jellyfish attacks it's prey, it using stinging cells called ________________.
a)
Colloblasts
b)
Stingers
c)
Cnidocytes
d)
Blastoscytes
22.
Which Cnidarian class is known for containing the most venomous animal on Earth?
a)
Cubozoa
b)
Scyphozoa
c)
Anthozoa
d)
Hydrozoa
23.
Hexacorallia, Ceriantipatheria, and Octocorallia are Subclasses of the Class ______________.
a)
Anthozoa
b)
Scyphozoa
c)
Cubozoa
d)
Hydrozoa
24.
Cnidarians have a trait called dimorphism. This means that....
a)
They can change size whenever they are being chased.
b)
They camouflage to blend in with various organisms.
c)
They have three body forms.
d)
They have two body forms.
25.
Which of the following is a reason that coral reefs populations are dying?
a)
Pollution
b)
Human Activity
c)
Global Warming
d)
All of the Above
26.
After a cnidarian has stung it's prey, it uses it's tentacles to pull the food into the hollow space inside of it's body. This space is called the __________________.
a)
Mesohyl
b)
Mesoderm
c)
Gastrovascular Cavity
d)
Coelovascular Cavity
27.
When corals become stressed due to poor environmental conditions, they expel the colorful xoozanthellae that live on their surface, causing the corals to appear white. This is called...
a)
Coral Reversion
b)
Coral Bleaching
c)
Coral Basking
d)
Coral Variation
28.
One reason that coral reefs are so important, is that they provide a home for many other organisms. Some of the species that live on coral reefs can't be found anywhere else in the world. This means they are ___________ to coral reefs.
a)
Endemic
b)
Epistemic
c)
Evident
d)
Exothermic
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