The presence of homologous structures in different species suggests:
Convergent evolution
Analogous adaptations
Shared ancestry
Independent mutations
Related Questions
Large size of pinnae in animals of warm region in comparison to animal of cold region is due to
Dollo’s law
Gloger’s law
Cope’s law
Allen’s rule
Microbial experiments show that …A… advantageous …B… when selected will result in observation of new phenotypes. Over few generations, this would result in …C… . Natural selection is a process in which …D… variations enabling better survival are enabled to reproduce and leave greater number of progeny
Choose the correct option for A, B, C and D to complete the given NCERT statement
A-post existing, B-mutation, C-speciation, D-heritable
A-post existing, B-mutation, C-speciation, D-unheritable
A-pre-existing, B-mutation, C-speciation, D-heritable
A-existing, B-mutation, C-speciation, D-heritable
Organic evolution is also called
Chemical evolution
Stellar evolution
Biological evolution
All of these
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
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.
Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution?
Development of transgenic animals
Production of dolly, the sheep by cloning
Prevalence of pesticide resistant insects
Development of organs from ‘stem cells’ for organ transplantation
The evolution of resistance to herbicides in weeds is a prime example of adaptation driven by:
Natural selection
Genetic drift
Anthropogenic selection pressure
Artificial selection
The present concept of evolution is known as
Natural Selection
Modern Synthesis
Darwinism
Lamarckism
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
Microbial experiments show that …A… advantageous …B… when selected will result in observation of new phenotypes. Over few generations, this would result in …C… . Natural selection is a process in which …D… variations enabling better survival are enabled to reproduce and leave greater number of progeny
Choose the correct option for A, B, C and D to complete the given NCERT statement
A: mutations, B: selected, C: evolution, D: heritable
A: adaptations, B: acquired, C: growth, D: acquired
A: variations, B: eliminated, C: degradation, D: environmental
A: characteristics, B: inherited, C: development, D: random
