Animal Kingdom

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

In which of the following animals nerve cell is present but brain is absent?

1. Sponge
2. Earthworm
3. Cockroach
4. Hydra

In which of the following, notochord is present in embryonic stage?

1. All chordates
2. Some chordates
3. Vertebrates
4. Non-chordates

In which of the following animals, haemocyanin pigment is found?

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

In which of the following animals post-anal tail is found?

1. Earthworm
2. Lower invertebrates
3. Scorpion
4. Snake

In Hydra, waste material of food digestion and nitrogenous waste material are removed respectively from

1. mouth and mouth
2. body wall and body wall
3. mouth and body wall
4. mouth and tentacles

Which of the following animals have scattered cells with cell-tissue grade organisation?

1. Sponge
2. Hydra
3. Liver fluke
4. Ascaris

Similarity in Ascaris lumbricoides and Anopheles stephensi is

1. sexual dimorphism
2. metamerism
3. anaerobic respiration
4. endoparasitism.

Which of the following characters is absent in all chordates?

1. Diaphragm
2. Coelom
3. Pharyngeal gill clefts
4. Dorsal nerve cord