Q. Biologists believe that mammals have been evolved from their reptilian ancestors they

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Q. Generations reproduced sexuallly and asexually in coelenterates, are

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Q. Annelids have specialized structure for excretion called

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Q. Amphibians are poikilothermix, therefore they use to hibernate in

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Q. Embryo of Taenia is inside egg and contain chitinous hook that are in number

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Q. An example of marine colonial that exhibits alternation of generations is

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Q. Skeleton of sponges is composed of needle-like structures called

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Q. Tasmania wolf found in Australia belong to class metatheria and termed as

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Q. Glandular epithelia envelope which secretes calcareous shell is called

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Q. Digestive system of nematodes have two openings and in form of

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Q. Digestive system of sharks and rays is

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Q. Blood of arthropods is colorless due to lack of

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Q. A harmful molluscus which is injurious to gardens and cultivations is termed as

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Q. Daphnia belongs to class

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Q. All animals of Grade bilateria are

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Q. Tail of sting ray can inflict very dangerous wounds by its

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Q. Anterior end of digestive system is mouth and posterior end is

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Q. Between ectoderm and endoderm, there is a jelly like

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Q. Muscles of annelids which are arranged along length of body are called

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Q. Class hirudinea have additional markings on their body which are called

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