Evolution

What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes ?

1. Evidence from fossil remains and the fossil mitochondrial DNA alone
2. Evidence from DNA extracted from sex chromosomes, autosomes
3. Comparison of chromosome morphology only
4. Evidence from DNA from sex chromosomes only

According to Oparin, which one of the following was not present in the primitive atmosphere of the earth ?

1. Water vapour
2. Oxygen
3. Methane
4. Hydrogen

Diversification in plant life appeared

1. By seed dispersal
2. Due to abrupt mutations
3. Due to long periods of evolutionary changes
4. Suddenly on earth

Convergent evolution is illustrated by:

1. Bacterium and protozoan
2. Rat and dog
3. Dogfish and whale
4. Starfish and cuttle fish

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?

1. Variations, natural selection, overproduction, constancy of population size
2. Overproduction, constancy of population size, variations, natural selection
3. Variations, constancy of population size, overproduction, natural selection
4. Overproduction, variations, constancy of population size, natural selection

Random genetic drift in a population probably results from

1. Constant low mutation rate
2. Interbreeding within this population
3. Large population size
4. Highly genetically variable individuals

Industrial melanism is an example of :-

1. Darkening of skin due to smoke from industries
2. Defensive adaptation of skin against ultraviolet radiations
3. Drug resistance
4. Protective resemblance with the surroundings

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