a) Explain about the cell wall and nucleoid of bacterial cell, their structure and composition in detail.

There are two main kinds of cells: eukaryotic and prokaryotic.

Bacterial cells are prokaryotic. Choose two structures of bacterial cells and describe them in brief; what do they look like, what are they composed of? Then, describe how these two structures enable bacterial cells to survive as an unicellular organisms.

b)Explain the functions of the sensory neurons, interneurons, and motor neurons in the nervous system in brief.

In context of the science of ecology and concept of the niche specialization, explain in brief the competitive exclusion principle and resource portioning.