The following points highlight the two main types of meiotic division. The types are: 1. The First Meiotic Division or Heterotypic Division 2. The Second Meiotic Division or Homeoptypic Division. Type # 1. The First Meiotic Division or Heterotypic Division: i. First Prophase Stage: This stage is divided into following stages: (a) Leptotene sub stage: The slide shows the first [...]
In this article we will discuss about the preparation of permanent mounts of various organisms. 1. Euglena: Living Euglena, for study, may either be collected from a patch of stagnant water having decaying green leaves or may be obtained from cultures in laboratory. For purpose of study in the living condition take a few euglena in a dropper or a [...]
In this article we will discuss about the structure of polystomella. This will also help you to draw the structure and diagram of polystomella. 1. It is a marine protozoan common on sea shores. 2. Body enclosed in a many chambered shell and each chamber is perforated with numerous pores. 3. Chambers are arranged in a spiral fashion. 4. Ectoplasm [...]