A.All the characters acquired by the individuals during life time and inherited
B.Organs used more by the organism grow more in size
C.Both (a) & (b)
D.None of these
A.RNA
B.Plasma proteins
C.Germplasm DNA
D.Somatoplasm DNA
A.New species evolve by sudden and distinct heritable changes called by mutations and not by natural selection
B.First individual showing is called mutant’. It is pure breeding as well as transmits mutations to its progeny and thus starts a new species
C.All organisms have tendency to mutate but the rate of mutation varies from time to time depending upon environmental and physiological conditions
D.The development and deficiency of organs are in proportion to use and disuse of these organs
A.That it does not explain presence of vestigial organs found in many mammals
B.That is overestimates the reproductive capacity of organisms
C.That it does not take into account the variations with heredity in the organisms
D.That it pre-supposes that environment upon earth has been changing through ages
A.Modifications in body parts through use and disuse
B.Enormous fertility, struggle for existence and survival of fittest
C.Inheritance of acquired characters
D.Appearance of sudden large variations, inheritance and survival of those having these variations
A.Environment
B.Gametes
C.Both (a) & (b)
D.None of these
A.That there is constant struggle for existence among individuals for food, shelter and other benefits
B.That there is enormous fertility among organisms leading to their over production
C.That there is selection of fittest individuals by the nature
D.Excessive overgrowth of useful structures bringing extinctions rather than evolution
A.Darwin and Charles Lyell
B.Darwin and Malthus
C.Darwin and Morgan
D.Darwin and Wallace
A.Intra-specific character
B.Acquired variations
C.Acquired capabilities
D.Inherited variation
A.Darwinism
B.Lamarckism
C.Natural selection
D.Special creation
