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
Which of the following statement is the most appropriate one in an evolutionary sense?
A lion is successful at capturing prey but has no cubs
A lion has many cubs, eight of which live to adulthood
A lion overcomes a disease and lives to have three cubs
A lion has a harem of many lionesses and one cub
Which of the following is a unit of natural selection?
Genus
Species
Individual
Population
First theory of evolution was given by
Charles Darwin
Hugo de Vries
Lamarck
Wallace
Biological concept of species is mainly based on
Reproductive isolation
Morphological features only
Methods of reproduction only
Morphology and methods of reproduction
Mutations are considered raw materials of evolution because they
Cause death of organism
Contribute to new variations
Are stable
Random
Which of the following statement is true regarding the theory of natural selection?
Natural selection leads to the evolution of perfect organisms.
Natural selection favors organisms with traits that enhance survival and reproduction in their environment.
Acquired characteristics during an organism's lifetime are inherited by its offspring.
Natural selection acts on populations, but individuals evolve.
The pioneers in the field of organic evolutions are
Darwin, Lamarck, Robert Hooke, Huxely
Darwin, Hugo de Vries, Lamarck, Huxley
Darwin, Lamarck, Hugo de Vries, Robert Brown
Darwin, Lamarck, Hugo de Vries, Purkinje
Mendel described the frequency of …A… for offsprings of a single …B…
Choose the correct options for A and B to complete the given NCERT statement
A: different types of genotypes; B: monohybrid cross
A: different types of phenotypes; B: dihybrid cross
A: different types of genotypes; B: test cross
A: different types of phenotypes; B: back cross
Homologous organs indicate:
Convergent evolution
Different ancestry
Common ancestry
Adaptation to similar environments
Theory of use and disease was stated by
Lamark
Darwin
T. Malthus
Wallace
