During which geological period of evolution did the greatest diversification of life occurred on the earth?
Permian
Jurassic
Cambrian
Ordovician
C.
Cambrian
The Cambrian explosion in the Cambrian period marks the occurrence of greatest diversification on the earth.
Most major phyla appeared (indicated by fossil study) divergence of modern Metazoan phyla occurred and major diversification of other organisms.
Before this period, most organisms were simple however, this changed after Cambrian period, the diversification rate accelerated and the diversity of life began to resemble that of today.
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
The presence of diversity at the junction of territories to two different habitats is known as
bottleneck effect
edge effect
junction effect
Pasteur effect
Human ancestors who left cave paintings were
Neanderthal man
Cro- magnon man
Java ape man
Peking man
Which of the following is not a vestigial structure in Homo sapiens ?
Third molar
Epiglottis
Plica semilunaris
Pyrimidalis muscle
Which of the following provides most evident proof of evolution?
Fossils
Morphology
Embryo
Vestigial organs
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
