Question # 1

Radial symmetry is present in

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Adults of annelida

Adults of echinodermata

Adults of Cnidaria

Both B and C

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

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Ostia

Osculum

Spicules

Medreporite

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

Which of the following group of animals is a link between aquatic and terrestrial animals?

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Fish

Amphibians

Reptiles

Birds

Parapodia are organs of locomotion in ……

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Leech

Planaria

Earthworm

Neries

Pick up the most developed coelomates

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Echinoderms

Annelids

Chordates

Insects

The body of a Hydra can be divided in two equal halves vertically in

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One plane only

Two planes

Three planes

Any plane

Animals involved in the construction of corals are

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Polyps

Medusae

Gonozooids

None

Which of the following has chitinous cuticle in the exoskeleton

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Arthropoda

Porifera

Echinodermata

Annelida

Skeleton of echinoderms is originated from

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Ectoderm

Endoderm

Mesoderm

Epidermis

Most of the vectors for spreading important human diseases belong to:

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Radiata

Acoelomates

Pseudocoelomates

Coelomates

Which of the following is a distinguishing character of sponges

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Tentacles

Ceoleteron

Choanocytes

Calcareous skeleton

The cells absent in sponges are

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Chondrocytes

Pinacocytes

Choanocytes

Archeocytes

Platyhelminthes have

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Asymmetrical body

Radial symmetry

Bilateral symmetry

Diploblastic organization

The cartilaginous fishes contain scales ….

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Placoid

Cycloid

Ganoid

Ctenoid

An organism of the lineage of animals in which the blastopore of the developing embryo becomes the anus, while a second opening becomes the mouth called:

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Triploblastic

Protostome

Diploblastic

Deuterostome

In earthworm, the surface responsible for the gaseous exchange is

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Skin

Gills

Body surface

Trachea

Highest degree of regeneration is present in sponges because of

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Undifferentiated cells

Simplest organization

Ability to reproduce

Absence of germ layers

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

Vector for spread of African sleeping sickness is

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Anopheles

Commonhouse fly

Tse-tse fly

Honey bee

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MDCAT Biology Chapter 6 Diversity among Animals Online Test MCQs With Answers

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