The following points highlight the five main structures of nucleus and its functions. The structures are: 1. Nuclear Envelope or Karyotheca 2. Nuclear Lamina 3. Nuclear Matrix 4. Nucleoplasm 5. Nucleolus. Structure # 1. Nuclear Envelope or Karyotheca: The nuclear membrane or karyotheca form an envelope-like structure around the nuclear contents and is commonly known as nuclear envelope. The nuclear [...]
The following points highlight the three regions present in the structure of honey bee. The regions are: 1. Head 2. Thorax 3. Abdomen. Region # 1. Head: The head of honey bee is a wide and triangular structure with the apex pointed below. On the dorsolateral sides there is a pair of compound eyes and in the middle of the [...]
The following points highlight the four main parts of mature egg of birds. The parts are: 1. Plasma Membrane 2. Primary Egg Membranes 3. Secondary Egg Membranes 4. Ooplasm. Mature Egg: Part # 1. Plasma Membrane: The mature egg is covered by a plasma membrane which is the unit membrane. It is composed of an outer and an inner layer [...]