In this article we will discuss about the water sample collection for physical and chemical analysis. I. Collection of Water Sample: A representative sampling is usually done by collecting samples from a number of places from different depths and mixing them together to get a composite sample. A Kemmerer, Friedinger or Forest type sampler is used for water collection. Bubbling [...]
In this article we will discuss about the dissection of different contents for vertebrates and invertebrates under microscope. I. Gut Contents: Preparation: Cut a small portion of the gut, contents of which is to be studied. Put it in a watch glass. Open it giving a longitudinal incision with a pair of fine scissors. Add a small amount of physiological [...]
In this article we will discuss about the structure of different vertebrata. Skull: 1. Presence of cranium, sensory capsules, foramen magnum and jaws. Ready identification: Identification: Skull Bufo, Rana: Subphylum Vertebrata: 1. Cranium bony or cartilagenous and encloses a cavity. 2. Cranium constituted by three rings— occipital, parietal and frontal. 3. Sense capsules—olfactory, optic and otic. 4. Foramina for cranial [...]