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 [...]
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 meaning and stages of oestrus cycle in female vertebrates. Meaning of Oestrus Cycle: During breeding season the vertebrate female undergoes hormonal changes influencing reproductive organs, inducing histological changes leading to development of eggs. The cycle is called Oestrus cycle. In this period the female permits sexual mating. This is called heat-period or [...]