During which geological period of evolution did the greatest diversification of life occurred on the earth?
Permian
Jurassic
Cambrian
Ordovician
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
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
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
The presence of diversity at the junction of territories to two different habitats is known as
bottleneck effect
edge effect
junction effect
Pasteur effect
B.
edge effect
Edge effect are changes in population or community structures that occur at the boundary of two or more habitats.
Bottleneck effect can be defined as the yearly or seasonal phenomenon in which size of a population is reduced severely.
Pasteur effect is defined as the reduction in the amount of breakdown of respiratory substrate and evolution of carbon dioxide when an anaerobically respiring material is brought in oxygen containing environment.
Which of the following provides most evident proof of evolution?
Fossils
Morphology
Embryo
Vestigial organs