Porifera

Q.

Mention any six characteristics of phylum porifera.

Q.

Define diploblastic animals.

Q.

What are spicules function?

Q.

What is the skeleton of sponges made up of?

Q.

Which category of organisms exhibits cell aggregate body plan?

Q.

How are porifera and Cnidaria similar?

Q.

What is choanocyte?

Q. Diffentiate between Porifera and Coelenterates

Q.

Is female gamete non-motile in Fucus?

Q.

Minute pores in the body wall of the sponges through which water enters into a central cavity are called.

1. Spicules

2. Ostia

3. Osculum

4. Choanocytes

Q.

Which structure is used for locomotion in bacteria?

1. Flagellum

2. Pili

3. Cilia

4. Pseudopod

Q.

To which phylum do sponges belong?

Q. Which of the following phyla have a cellular grade of organisation?

1. Porifera
2. Cnidaria
3. Aschelminthes
4. Platyhelminthes

Q.

Identify the organism in the given figure and name the phylum to which it belongs. Label A to H in the given diagram. [5 MARKS]

Q.

In vertebrates, the coelom is derived from which germ layer?

1. Ectoderm

2. Endoderm

3. Mesoderm

4. Both ectoderm and endoderm

Q.

Which flow chart correctly shows the sequence of movement of water in the sponge canal system?

1. Osculum → Spongocoel → Ostia

2. Spongocoel → Ostia → Osculum

3. Ostia → Spongocoel → Osculum

4. Ostia → Osculum → Spongocoel

Q.

Most of the sponges are

1. Colonial

2. cold water inhabitants

3. Fresh water forms

4. solitary

Q.

Sponges are considered pore bearers. Discuss.

Q.

Sponges have a cell aggregate body plan with numerous pores all over their body. To which phylum do they belong?

1. Porifera

2. Coelenterata

3. Platyhelminthes

4. Nematoda

Q.

Which of the following groups of organisms are categorized under Protista as per Whittaker’s classification?

1. Euglenoids

2. Chrysophytes and dinoflagellates

3. Slime molds and protozoans

4. All of the above

Q.

What are parazoa?

Q.

Sponges are the simplest form of unicellular animals.

1. True

2. False

Q. Which of the following is not a characteristic of organisms belonging to phylum Porifera?

1. They are non-motile and attached to some solid support.
2. They have holes or pores all over the body for circulation.
3. Covered with hard outer skeleton or exoskeleton.
4. Well differentiated body plan.

Q. include spiny-skinned organisms.

1. Mollusca
2. Protochordata
3. Echinodermata

Q. Choose the names of organisms that fall under phylum Porifera.

1. Spongilla
2. Sycon
3. Euplectelea
4. Hydra

Q.

Pore-bearing organisms come under the phylum ________.

Q.

Who Coined The Term "Protozoa"?

Q.

Name the following:
(a) Cavity present in the body of sponges.
(b) Cavity present in the body of cnidarians.

Q.

Question 39
Match items of column A with items of column B

$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \left(a\right)\text{Pore bearing animals}& \left(A\right)\text{Arthropoda}\\ \left(b\right)\text{Diploblastic}& \left(B\right)\text{Coelenterata}\\ \left(c\right)\text{Metameric segmentation}& \left(C\right)\text{Porifera}\\ \left(d\right)\text{Jointed~legs}& \left(D\right)\text{Echinodermata}\\ \left(e\right)\text{Soft bodied animals}& \left(E\right)\text{Mollusca}\\ \left(f\right)\text{Spiny~skinned~animals}& \left(F\right)\text{Annelida}\end{array}$

Q. What are lignins , cellulose in simple permanent tissue ?