Question

1. ____________________ is the example of Hemichordata.

a) Amphioxus

b) Balanoglossus

c) Doliolum

d) Hydra

2. __________________ belongs to phylum porifera.

a) Vorticella

b) Euplectella

c) Jellyfish

d) Planaria

3. Animals belonging to phylum ____________are acoelomate.

a) Aschelminthes

b) Annelida

c) Platyhelminthes

d) Hemichordata

4. Great power of regeneration is shown by_________

a) Hydra

b) Earthworm

c) Leech

d) Ascaris

5. Nematocysts present on the tentacles of hydra acts as the structures of ____________

a) Offence and defence

b) reproduction

c) locomotion

d) skeleton

6. Paramecium belongs to class _________

a) Ciliata

b) Sporozoa

c) Hydrozoa

d) Toxoplasma

7. Classification of phylum Porifera is based on____________

a) Skeleton

b) Shape of choanocytes

c) Canal system

d) Ascocytes

8. Movement of food vacuole in paramecium along a definite path is known as __________

a) Cyclosis

b) Cytokinesis

c) Endomixis

d) Megagenesis​

Answer 1

Answer:

1. Acorn worm, Pterobranchia, Planctosphaeroidea , Graptolithina.

2.Sponges

3.Flatworms

4.freshwater planarians

5.nidarians contain specialized cells known as cnidocytes (“stinging cells”), which contain organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, serving to immobilize prey with toxins contained within the cells. Nematocysts contain coiled threads that may bear barbs.

6.Oligohymenophorea

7.Classification of sponges is primarily based on skeleton which are spicules. These belongs to phylum-Porifera.

8.Cyclosis

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Explanation: