Hydra prevents self fertilization by being
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Phylum - Coelentrata
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Which of the following tissue is absent in Hydra ?
Polymorphic coelentrates are the members of the class
Pueumatophore is present in
Tentaculocysts in Obelia are meant for
If a Hydra is cut into two pieces, it is noted that
Musculo-glandular cells are found in hydra
In jelly fishes, the adult is always
If nematocysts are absent in Hydra, which is affected
In Hydra, the nematocysts are abundant on
A piece of Hydra will regenerate into a full Hydra if it contains a part of
The small green alga that lives inside Hydra is called
The mesoglea of Hydra contains
What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
Which of the following animals has a nervous system but no brain ?
The larva of Hydra is known as
Ctenophores differ form cnidorians in one important aspect, that is
In Hydra, the gastrodermis is composed of
What is common between Hydra and Obelia ?
Six septa or six mesenteries are characteristic of
Nutritionally Hydra is
Coelenteron of Hydra serves the double purpose of
Most favourite food of Hydra is
Hydra respires through
In Hydra, the physiological division of labour is exhibited by
Ephyra is the larval form of
The body wall of Hydra consists of
Nematocysts of Hydra are important for
Rhopalia are the sense organs in medusa belonging to the class
The first invertebrates to develop a true nervous system are
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