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Animal Kingdom

Short Answer Type

231.

Name two internal characteristic features of class-Mammalia

232.

State the advantages of composite fish culture.

Multiple Choice Questions

233.

'Water vascular' system is found in

sea-anemone
sea-pen
sea-cucumber
sea-horse

234.

Retrogressive metamorphosis occurs in

Hemichordata
Cephalochordata
Urochordata
Vertebrata

235.
'Organ of Jacobson' helps in

touch

vision

smell

hear

smell

Jacobson's organ, also called vomeronasal organ, an organ of chemoreception is a part of the olfactory system of amphibians, reptiles, and mammals, although it does not occur in all tetrapod groups. It was discovered by Frederick Ruysch and later by Ludwig Jacobson mis 1813.