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The internal characteristic features of Class- Mammalia are:

(i) Body cavity is divided by a muscular diaphragm between thorax and abdomen.

(ii) Body is maintained at a hugh and constant temperature by means of internal regulation.

232.

State the advantages of composite fish culture.

233.

'Water vascular' system is found in

234.

Retrogressive metamorphosis occurs in

235.

'Organ of Jacobson' helps in

236.

Cysticercus stage is formed in

237.

Which of the following is a catadromous fish?

238.

Which of the following animal belongs to class-Crustacea?

239.

Radula is found in

240.

the scientific name of Asian Tiger Mosquito