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Flame cells present in platyhelminthes, are specialised in
In ctenophora, the body bears ___________ external rows of ciliated comb plates, which help in locomotion.
Biradial symmetry and lack of cnidoblasts are the characteristics of
In which one of the following sets of animals do all the four give birth to young ones?
Penguin, Kiwi & Ostrich all belong to class Aves of chordata (i.e.birds) and they do not give birth to their young ones,they are oviparous while Kangaroo,Hedgehog, Dolphin, Loris all belong to class mammalia and are viviparous.
Meandrina (Brain coral) belongs to phylum –
Two common characters found in centipede, cockroach and crab are
Jointed legs & chitinous exoskeleton are the common characters found in centipede, cockroach & crab
In contrast to Annelids the Platyhelminths show:
Platyhelminthes includes flat warms. There is no bodycavity. The animals are therefore acoelomates. Annelids also have bilateral symmetry. They are coelomate having a perivisceral cavity divided into compartments.
Few cnidarians like corals have a skeleton composed of__________.
From the following statements select the wrong one.
Animals belonging to Phylum Porifera are mostly marine except afew which are found in fresh water- e.g.Spongilla, Euspongia
Which one of the following characters is not typical of the class Mammalia?
Mammals have 12 pairs of cranial nerves.