Which one of the following categories of animals,is correctly described with no single exception in it?
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Solution
All sponges are marine and have collared cells without any exception. Sponges are animals of the phylum Porifera. They are multi cellular organisms which have bodies full of pores and channels allowing water to circulate through them.
Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them?
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Solution
Sea horse and flying fish are cold blooded animals.Ornithorhyncus is oviparous. Crocodile has four chambered heart. Ascaris and Ancylostoma are segmented roundworms.
In class of Amphibia, respiration occurs through-
In which one of the following the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct ?
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Solution
Molluscans are soft bodied animals. Their body is unsegmented with a distinct head, muscular foot and visceral hump. In Pila the buccal cavity contains are sping organ, the radula with transverse rows of teeth.
Frogs differ from humans in possessing:
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Solution
Human possesses enucleated RBC in mature state. But frog blood has both white and red blood cells which are nucleated. Frog cells do not lack platelets.
Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?
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Solution
Notochord is a flexible rod like structure that forms the main support of the body in the lowest chordates. It is not absent in humans through out their life. Notochord is present in embryonic stage and get changed or replaced by vertebral column in the adult.
In which of the following possesses poison sting belong to class chondrichthyes?
In which one of the following, the genus name, its two characters and its class/phylum are correctly matched?
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Solution
The characteristics and phylum of Pteropusis correct.
Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?
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Solution
Chondrichthyes are the cartilaginous fish with a flexible skeleton made of cartilage rather than bone.
Which one of the following have the highest number of species in nature?
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Solution
In nature insects have the highest number of species (30 million). Fungi have 100,000, angiosperms have 260,000 and birds have 10,000 species.