Question # 1

First invertebrate to develop a nervous system is

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Sponges

Cnidarians

Flat worms

Round worms

The pore by which the water leaves the body of sponges is called

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Ostia

Osculum

Spicules

Medreporite

The cartilaginous fishes contain scales ….

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Placoid

Cycloid

Ganoid

Ctenoid

In earthworm, the surface responsible for the gaseous exchange is

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Skin

Gills

Body surface

Trachea

Which of the following is not triploblastic

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Cnidaria

Arthropoda

Platyhelminthes

Aschelminthes

Pre-chordates is another name used for

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Echinoderms

Protochordates

Cephalochordates

Hemichordates

Phylum of asymmetrical animals is

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Nematoda

Platyhelminthes

Cnidaria

Porifera

Animals devoid of respiratory, excretory and circulatory organs are

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Tapeworms

Sponges

Earthworm

Live fluke

Skeleton of echinoderms is originated from

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Ectoderm

Endoderm

Mesoderm

Epidermis

A group of animals with distinct germinal layers in adult stage are grouped in

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Cnidaria

Arthropoda

Aschelminthes

Platyhelminthes

Which of the following is true about mesoglea

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Acellular

Mesodermal

Cellular

Multicellular

In deuterostomes mesoderm is derived from wall of developing

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Coelom

Heart

Archenteron

Blastopore

Which characteristic is common in both cnidarians and flatworms

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Digestive system with a single opening

Dorsoventrally flattened bodies

Radial symmetry

Flame cells

Circulatory system is open type in all of the following, EXCEPT

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Arthropoda

Bivalvia

Gastropoda

Cephalopoda

It is not a germ layer

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Ectoderm

Endoderm

Blastoderm

Mesoderm

Animals that have their body cavity filled with parenchyma are

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Acoelomates

Coelomates

Pseudocoelomates

Tunicates

Which of the following has chitinous cuticle in the exoskeleton

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Arthropoda

Porifera

Echinodermata

Annelida

The only phylum included in Grade Radiata is:

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Porifera

Aschelminthes

Platyhelminthes

Cnidaria

Which one of the following phylum is the example of coelomates

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Flatworms

Round worms

Segmented worms

Unsegmented worms

Notochord is present throughout life in

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Urochordates

Chordates

Cephalochordates

Vertebrates

It is an animal, but it does not have nerve or muscle tissue. It is neither diploblastic nor triploblastic. It is probably a

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Flatworm

Nematode

Cnidarian

Sponge

The pairs of gills present in cyclostomata are

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5-7

10-12

6-14

4-5

Platyhelminthes have

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Asymmetrical body

Radial symmetry

Bilateral symmetry

Diploblastic organization

Protostomes and deuterostomes do not differ in

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Type of cleavage

Origin of mouth and anus

Number of germ layers

Mode of coelom formation

The most common animal of phylum Aschelminthes is:

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Enterobuis vermicularis

Ascaris lumbricoides

Ancylostoma duodenale

Rhabditis

Which of the following is a distinguishing character of sponges

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Tentacles

Ceoleteron

Choanocytes

Calcareous skeleton

Common housefly is involved in spread of all diseases except

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Hepatitis

Malaria

Dysentery

Cholera

The larva formed during the life cycle of Annelida is

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Glochidium larva

Bipinnaria larva

Trochophore larva

Tornaria larva

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