Cnidaria and Platyhelminthes

Q.

Are all triploblastic animals coelomate?

Q.

What are earthworms and red worms?

Q.

Are humans bilateral symmetry?

Q.

Are octopuses bilaterally symmetric?

Q.

Are all cnidaria aquatic?

Q.

Identify the correct statement.

1. Tissue is a group of dissimilar cells.

2. An organ consists of similar cells.

3. Vacuoles are not found in plant cells.

4. Prokaryotes do not have a nucleus.

Q. sir
how organisms of porifera digest?

Q.

Parazoa includes -

1. Protozoans

2. Porifera

3. Parasites of invertebrates (mosozoa)

4. None of the above

Q.

How do cnidarians defend themselves?

Q. How do porifera protect themselves?

Q. The phylum name Cnidaria is suggestive of injecting toxin in the body of prey through _____.

1. collar cells
2. cnidoblast
3. oscula
4. oral suckers

Q.

Corals are:

1. Poriferans attached some solid support

2. Cnidarians are solitary living

3. Poriferans present at the sea bed

4. Cnidarians that live in colonies

Q.

Define chordates with their characters.

Q. An organism X exhibits following characteristics-
a) Non-motile
b) Attached to some solid support
c) Has canal system
d) Mainly found in marine habitats

On the basis of these characteristics, in which phylum can you place X.

1. Platyhelminthes
2. Annelida
3. Echinodermata
4. Porifera

Q. Features of porifera

Q. Which among the following organisms does NOT fall under the phylum Porifera

1. Vase sponge
2. Yellow tube sponge
3. Hydra
4. Spongilla

Q.

The animals which are exclusively aquatic, sessile with cellular level of organization of the body are placed in phylum _____.

1. Porifera

2. Ctenophora

3. Cnidaria

4. Protozoa

Q. Identify the stinging cells abundant in the tentacles of hydra.

Q.

Poriferans are

1. None of the above

2. Porifera

3. Protozoans

4. Parasites of invertebrates (mosozoa)

Q. If you cut planaria vertically, you will get two equal halves. What does this indicate?

1. The organism is asymmetrical.
2. The organism is radially symmetrical.
3. The organism is bilaterally symmetrical.
4. None of the above

Q.
A, B and C types of coelom are present in those animals which belong to the phyla having respective characteristics (i), (ii) and (iii). Select the correct option for characteristics (i – iii).

1. (i) - Kidney like organ is present for excretion
   (ii) - Setae or parapodia are present for locomotion
   (iii) - Flame cells are present for excretion
2. (i) - Nephridia are present for excretion
   (ii) - Special cells for offence/defence are present called cnidoblasts
   (iii) - The animals with jointed feet are present in this phylum
3. (i) - Malpighian tubules are present for excretion
   (ii) - The segmented animals are present in this phylum
   (iii) - Autotomy is present in them
4. (i) - Flame cells are present for excretion
   (ii) - Animals have false body cavity
   (iii) - Water vascular system is present

Q. Liver fluke is called __________ because it has both male and female reproductive organs.

1. acoelomate
2. parasite
3. diploblastic
4. hermaphrodite

Q. Identify (1), (2) and (3) from the given table.

$\begin{array}{ccc}Phylum& Germlayer& Bodycavity\\ \text{(1) \_\_\_\_\_\_\_\_\_\_}& \text{Triploblastic}& \text{No coelom}\\ \text{Nematoda}& \text{Triploblastic}& \text{(2) \_\_\_\_\_\_\_\_\_\_}\\ \text{Annelida}& \text{(3) \_\_\_\_\_\_\_\_}& \text{True coelom}\end{array}$

1. (1) Porifera, (2) No coelom, (3) Diploblastic
2. (1) Platyhelminthes, (2) True coelom, (3) Triploblastic
3. (1) Platyhelminthes, (2) False coelom, (3) Triploblastic
4. (1) Porifera, (2) False coelom, (3) Triploblastic

Q. Liver flukes belong to the phylum ___.

1. Porifera
2. Coelenterata
3. Platyhelminthes
4. Nematoda

Q.

Select odd one with respect to Porifera

1. Spongilla

2. Euplectella

3. Sycon

4. Sea-anemone

Q. Choose the organisms that come under the phylum Coelenterata.

1. Hydra
2. Jelly fish
3. Sea anemone
4. Liverfluke

Q.

The stinging cell is a characteristic feature of phylum:

1. Coelenterata

2. Porifera

3. Annelida

4. Arthropoda

Q.

To which phylum do sponges belong?