Evolution

Reason of diversity in living beings : -

1. Mutation
2. Short term evolutionary change
3. Long term evolutionary change
4. Gradual change

Which of the following is closest relative of man ?

1. Gorilla
2. Chimpanzee
3. Gibbon
4. Orangutan

Which of the following is correct order of the evolutionary history of man ?

1. Peking man, Heidelberg man, Neanderthal man, Cro-Magnon man
2. Peking man, Neanderthal man, Homo sapiens, Cro-Magnon man
3. Peking man, Neanderthal man, Homo sapiens, Heidelberg man
4. Peking man, Homo sapiens, Neanderthal man, Cro-Magnon man

First life on earth was : -

1. Autotrophs
2. Photoautotrophs
3. Cyanobacteria
4. Chemoheterotrophs

Forthcoming generations are less adaptive than their parental generation due to

1. Genetic drift
2. Natural selection
3. Mutation
4. Adaptation

Occurrence of endemic species in South America and Australia is due to

1. There is no terrestrial route to these places
2. Retrogressive evolution
3. These species have become extinct from other regions
4. Continental separation

Darwin's theory of pangenesis shows similarity with theory of inheritance of acquired characters then what shall be correct according to it

1. There should be some physical basis of inheritance
2. Size of organs increase with aging
3. Useful organs become strong and developed while useless organs become extinct. These organs help in struggle for survival
4. Development of organs is due to will power

In Lederberg's replica plating experiment, what shall be used to obtain a streptomycin-resistant strain?

1. Only minimal medium
2. Complete medium and streptomycin
3. Only complete medium
4. Minimal medium and streptomycin

Which is not a vestigial organ in man?

1. Segmental muscles of abdomen
2. Third molar
3. Coccyx
4. Nails

Homo sapiens have evolved in

1. Pleistocene
2. Paleocene
3. Oligocene
4. Holocene