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 [...]
The following points highlight the top nine strategies of adaptation in animals. The strategies are: 1. Migration 2. Hibernation 3. Aestivation 4. Camouflage 5. Mimicry 6. Echolocation 7. Warning Colouration 8. Water Scarcity 9. Cold. Strategy # 1. Migration: This is a seasonal movement of complete population of animals to a more favourable environment. It is usually a response to [...]
In this article we will discuss about the replication of viral DNA and RNA in animals. Replication of Viral DNA: Replication of DNA of viruses usually takes place in the nucleus of the host cell; poxviruses are the exceptions because their genome replicates in the cytoplasm of the host cell. Messenger RNA (mRNA) of all animal DNA viruses is transcribed [...]