Question

its urgent bacteria have a simpler body plan when compared with human beings.Does it mean that human beings are more evolved than bacteria ?explain your answer

Answer 1

Evolution cannot be equated with progress. We cannot say human beings with complex body form have evolved from lower organisms like bacteria.

Human beings are highly evolved organisms than bacteria.

Bacteria are unicellular organisms. These are prokaryotic cells where one organism is made up of one cell. A single cell performs all the life processes required by the organism which include nutrition, digestion, respiration, transportation, excretion and reproduction. Bacteria hence exhibit cellular grade of organisation.

Human beings are multicellular organisms made up of well developed eukaryotic cells. They exhibit organ system of organisation. i.e. Group of cells form a tissue, Group of tissues form an organ, Group of organs form an organ system and Group of organ systems form a complete organism. There occur division of labour in the body organisation. Human beings are highly evolved organisms with 11 well developed organ systems. Each organ system takes care of on eimportant life process which aids the organism to continue its life.