In this article we will about the dissection and structure of chick embryo. Dissection of Chick Embryo: Break the egg shell at the narrow end by striking it gently with the handle of a scalpel. Remove the egg shell in pieces with a pair of forceps till the opening is large enough to pour out the contents without damaging the [...]
In this article we will discuss about the structure of different vertebrae. I. Procoelous: A. Bufo sp. (Toad), Rana sp. (Frog): 1. Hypapophysis and chevron bone absent. 2. Neural spine: A median elevation (Bufo); backwardly directed (Rana). 3. Atlas: Prezygapophyses absent. 4. Typical vertebra: Postzygapophysis present. B. Calotes sp. (Lizard): 1. Presence of hypapophysis in cervical and chevron bone in [...]
In this article we will discuss about the collection of plankton. I. Biotic Community: An aquatic microscopic biotic community is constituted by: (a) Pelagic forms suspended in water, localised mostly towards the surface, and (b) Benthonic or bottom dwellers attached to the bottom or submerged in mud. Collection of Plankton: Pelagic forms: A. Hand net: 1. The plankton is collected [...]