Human Evolution Welcome to your Human Evolution 1. Which one of the following is not a vestigial part in human beings? Segmental muscles of abdomen Third molar on each side in each jaw Finger nails Coccyx2. The first scientist who proposed his theory of evolution was Lamarck Darwin Mendel Wallace3. The theory of Natural selection was proposed by Mendel Wallace Lamarck Darwin4. The brain capacity of Homo erectus was about 1200 c.c 900 c.c 1600 c.c 650 c.c5. The cranial cavity of the modern man was 450-650 c.c 600-900 c.c 900-1000 c.c 1300-1600 c.c6. The extinct human who lived 1,00,000 to 40,000 years ago in Europe, Asia and parts of Africa, with short stature, heavy eye brows, retreating forehead, large jaws with heavy teeth, stocky bodies, a lumbering gait and stooped posture was Homo habilis Neanderthal human Ramapithecus Cro-Magnon humans7. The extinct human ancestor who ate only fruits and hunted with stone weapons was Australopithecus Dryopithecus Homo erectus Ramapithecus8. The prehistoric man which lived on Earth during late Pleistocene period was Australopithecus Atlantic man Peking man Neanderthal man9. During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result". To correct your friend's misconception Only favourable adaptations have survival value Overproduction of offspring leads to a struggle for survival Characteristics acquired during an organism's life are not passed on through genes Spontaneous mutations can result in the appearance of new traits10. Lamarckism cannot explain Heterophylly Weak muscles in the son of a wrestler Webbed toes in aquatic birds Long, narrow, limbless body of snakes11 out of 10Please fill in the comment box below.
