The following points highlight the two types of eggs. The types are: 1. Eggs Based on Quantity of Yolk 2. Eggs Based on Distribution of Yolk in Cytoplasm. Type # 1. Eggs Based on Quantity of Yolk: 1. Microlecithal Eggs: They contain very small amount of yolk, e.g. eggs of Sea urchin, Herdmania, amphioxus. The eggs of man contain very [...]
In this article we will discuss about:- 1. Levels of Organisation Found in Animals 2. Body Plans of Animals. Levels of Organisation Found in Animals: 1. Protoplasmic or Acellular Level: The organisation is at the level of protoplasm. It is present in protozoans. 2. Cellular Level: The body consists of many cells which may be similar or show minor division [...]
The below mentioned article provides biology notes on Eucoelomates. The animals which possess true coelom are called eucoelomates or coelomates. The true eucoelomates is a body cavity which arises as a cavity in embryonic mesoderm. In this case, the mesoderm of the embryo provides a cellular lining, called coelomic epithelium or peritoneum, to the cavity. The eucoelomates is filled with [...]