Nervous System · The nervous system of earthworm is not well developed and is divided into the Central nervous system (CNS), Peripheral nervous system (PNS) and Sympathetic nervous system (SNS). a. Central nervous system (CNS) · …
Circulatory System and Circulation · Circulatory system of earthworms is of closed type as the blood flows in the closed blood vessels. · It consists of various types of blood vessels, heart, capillaries and Plexi which facilit…
Digestive System and Digestion · The digestive system of earthworm consists of the tubular alimentary canal and digestive glands associated with it. · Alimentary canal is a long straight tube with a variable diameter extending fr…
· ‘T.H. Huxley’ made the first attempt to explain the origin of man on a scientific basis in his book ‘Man’s Place in the Nature’ (1863AD). · ‘Charles Darwin’ published his views on man’s ancestry in the book ‘Descent of Man’ (18…
· Many theories have been put forward by many scientists to explain the mechanism of evolution. · Some of the important theories are given below. 1. Lamarckism or Lamarck's theory or Theory of Inheritance of Acquired ch…