Which process is primarily responsible for the increase in the frequency of beneficial alleles in a population?
Genetic drift
Gene flow
Mutation
Natural selection
Related Questions
The concept of natural selection in evolution was proposed by
Charles Robert Darwin
August Weismann
Hugo de Vries
Jean Baptiste Lamarck
Which of the following is not a concept of Lamarck?
Environmental pressure causes variation
Rate and survival of organism is different due to variation
Inheritance of acquried characters
If an organ is used constantly it will continuously increase its size
Lamarck’s concept of inheritance of acquired characters was discarded by
I. Mendel’s laws of inheritance
II. Theory of natural selection
III. Mutational theory
IV. Theory of continuity of germplasm
Choose the correct combination of the given options to complete the given statement
I and II
II and III
I and IV
III and IV
The variation in the natural selection is on, it is due to the random mutations. What does this imply about the natural selection?
Natural selection is a random process
Natural selection is nevertheless a directed process. The likelihood one variant will be favoured in a given environment over another is predictable, even if the origin is not
Natural selection is a hypothetical process
None of the above
Which of the following refer to correct example (s) of organisms which have evolved due to changes in environment brought about by anthropogenic action ?(a) Darwin’s Finches of Galapagos islands.(b) Herbicide resistant weeds.(c) Drug resistant eukaryotes.(d) Man-created breeds of domesticated animals like dogs.
(a) and (d)
(b) and (c)
(a), (b) and (c)
(b), (c) and (d)
According to the Darwin’s theory of evolution, differences between the species occurs due to
The disuse of body structures
The transmission of acquired characteristics
Natural selection
Mutagenic agents
According to Darwin, the organic evolution is due to
Competition within closely related species
Reduced feeding efficiency in one species due to the presence of interfering species
Intraspecific competition
Inter specific competition
Industrial melanism is an example of
Protective resemblance with the surroundings
Defensive adaptation of skin against ultraviolet radiations
Drug resistance
Darkening of skin due to smoke from industries
The concept of natural selection in evolution was proposed by
Charles Robert Darwin
August Weismann
Hugo de Vries
Jean Baptiste Lamarck
Which of the following is NOT a direct example of an organism's evolution being influenced by anthropogenic activities?
Evolution of beak shape in Galapagos finches
Development of camouflage in peppered moths
Emergence of antibiotic-resistant bacteria
Development of pesticide resistance in insects
