Evolution

In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner :-

1. Selection
2. Random drift
3. Mutations
4. Migration

Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution ?

1. Survival of the fittest
2. Parasites and predators as natural enemies
3. Discontinuous variations
4. Struggle for existence

Which one of the following describes correctly the homologous structures ?

1. Organs with anatomical dissimilarities but performing same function
2. Organs that have no function now, but had an important function in ancestors
3. Organs with anatomical similarities, but performing different functions
4. Organs appearing only in embryonic stage and disappearing later in the adult

In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution, because :-

1. They are uniparental in origin and do not take part in recombination
2. They can be studied from the samples of fossil remains
3. Their structure is known in greater detail
4. They are small, and therefore, easy to study

Some bacteria are able to grow in streptomycin containing medium due to

1. natural selection
2. induced mutation
3. reproductive isolation
4. genetic drift.

Which of the following is important for speciation ?

1. Behavioural isolation
2. Seasonal isolation
3. Tropical isolation
4. Reproductive isolation

Which of the following are homologous organs ?

1. Wings of birds & Pectoral fins of fish
2. Wings of bat & Butterfly
3. Legs of frog & Cockroach
4. Wings of birds & Locust

Genetic drift operates in : -

1. Slow reproductive population
2. Small isolated population
3. Large isolated population
4. Fast reproductive population

There is no life on moon due to the absence of -

1. O2
2. Light
3. Water
4. Temperature

According to fossils which discovered up to present time, origin and evolution of man was started from

1. Java
2. Africa
3. China
4. France

In which condition, the gene ratio remains constant for any species population ?

1. Gene flow
2. Mutation
3. Sexual selection
4. Random mating

Sequence of which of the following is used to know the phylogeny ?

1. DNA
2. r-RNA
3. m-RNA
4. t-RNA

In which era reptiles were dominant ?

1. Archaeozoic era
2. Mesozoic era
3. Coenozoic era
4. Paleozoic era

Half life period of C14 is : -

1. 5000 years
2. 50 years
3. 500 years
4. 5 104 years

Similarities in organism with different genotype indicates : -

1. Divergent evolution
2. Macroevolution
3. Convergent evolution
4. Microevolution

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

Character which is closely related to human evolution

1. Reduction in size of jaws
2. Disappearance of tail
3. Flat nails
4. Binocular vision

Which evidence of evolution related to Darwin's finches?

1. Evidences from comparative anatomy
2. Evidences from embryology
3. Evidences from biogeographical distribution
4. Evidences from palaeontological

Who is directly related to man?

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