Which of the following is not a vestigial structure in Homo sapiens ?
Third molar
Epiglottis
Plica semilunaris
Pyrimidalis muscle
B.
Epiglottis
Vestigial organs are degenerate, non- functional and rudimentary organs correspond to fully developed and functional organs of related organism. Wisdom teeth (third molar) , Plica semilunaris and Pyrimidalis muscles are vestigial organs.
Epiglottis is not a vestigial organ in man. It is the structure that prevents the entry of food into respiratory tract during swallowing in man.
Which of the following provides most evident proof of evolution?
Fossils
Morphology
Embryo
Vestigial organs
Human ancestors who left cave paintings were
Neanderthal man
Cro- magnon man
Java ape man
Peking man
During which geological period of evolution did the greatest diversification of life occurred on the earth?
Permian
Jurassic
Cambrian
Ordovician
The presence of diversity at the junction of territories to two different habitats is known as
bottleneck effect
edge effect
junction effect
Pasteur effect
The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin, provides evidence for
Origin of species by natural selection
Intraspecific Variations
Intraspecific competition
Interspecific competition
About how long ago was the earth formed
3 billion years ago
10 billion years ago
4.6 billion years ago
20 billion years ago
