In this article we will discuss about the skeletal structure of toad. There is no exoskeleton in toad. The skeleton that supports the soft parts lies internally and is designated as endoskeleton. It is chiefly made up of bones and cartilages. These two structures are associated with one another to form the internal framework. The endoskeleton is described under two [...]
In this article we will discuss about the reproductive system of pigeon. The sexes are separate. Sexual dimorphism is absent in pigeon. Female reproductive system: The female reproductive system is peculiar by having only left ovary and left oviduct (Fig. 1.127A). (i) Ovary: The right ovary and oviduct are atrophied in adult. The left ovary is large and contains eggs [...]
In this article we will discuss about the characters and classification of urochordata. Characters of Urochordata: These animals are known as 'sea squirt'. The life-history of urochordates passes through a dramatic change. Their chordate characters are more pronounced during larval period. While in adults they are more like invertebrates than chordates. Therefore, the characters are described in two heads — [...]