Animal Kingdom

Which one of the following has an open circulatory system?

1. Octopus
2. Pheretima
3. Periplaneta
4. Hirudinaria

In contrast to annelids the platyhelminthes show

1. absence of body cavity
2. bilateral symmetry
3. radial symmetry
4. presence of pseudocoel.

From the following statements select the wrong one

1. Prawn has two pairs of antennae.
2. Nematocysts are characteristic of the phylum Cnidaria.
3. Millipedes have two pairs of appendages in each segment of the body.
4. Animals belonging to phylum Porifera are marine and fresh water.

Which one of the following characters is not typical of the class Mammalia?

1. Thecodont dentition
2. Alveolar lungs
3. Ten pairs of cranial nerves
4. Seven cervical vertebrae

In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen?

1. Insecta
2. Myriapoda
3. Crustacea
4. Arachnida and Crustacea

The animals with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage, belong to the Phylum

1. Annelida
2. Mollusca
3. Cnidaria
4. Echinodermata

One of the following is a very unique feature of the mammalian body

1. homeothermy
2. presence of diaphragm
3. four chambered heart
4. rib cage

Sycon belongs to a group of animals, which are best described as

1. unicellular or acellular
2. multicellular without any tissue organization
3. multicellular with a gastrovascular system
4. multicellular having tissue organization, but no body cavity.

During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively

1. redia and miracidium
2. cercaria and redia
3. metacercaria and cercaria
4. miracidium and metacercaria

Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits?

1. Pheretima – Sexual dimorphism
2. Musca – Complete metamorphosis
3. Chameleon – Mimicry
4. Taenia – Polymorphism