Theory of pangenesis was given by
Darwin
Lamarck
Hugo de Vries
Oparin
A.
Darwin
Darwin proposed the theory of pangenesis to explain the inheritance of characteristics from parents to offsprings. According to this theory, every somatic cell produces gemmules and the actual germ cells are the sites of a collection of gemmules coming from different somatic
cells.
Which one of the following in birds indicates their reptilian ancestry?
Scales on their hindlimbs
Four-chambered heart
Two special chambers crop and gizzards in their digestive tract
Egg with a calcareous shell
Darwins finches represent
Morphological variations
Geographical isolations
Climate variations
Reproductive isolation
The best description on natural selection is
The reproductive success of the members of a population best adapted to an environment
It acts when the resources are unlimited
A change in the proportion of variations within a population
It follows Hardy-Weinberg principle
The term ‘prebiotic’ soup’ for organic water containing mixture of simple organic compounds was given by
Richter
Haldane
Arrhenius
Miller
Which of the following is the most primitive ancestor of man?
Ramapithecus
Homo habilis
Australopithecus
Homo sapiens neanderthalensis
Which one of the following human ancestors is known as tool maker?
Homo erectus
Java man
Homo habilis
Heidelberg man
Darwinism explains all the following except
Within each species, there are variations
Organisms tend to produce more number of offspring that can survive
Offspring with better traits that overcome competition are best suited for the environment
Variations are inherited from parents to offspring through genes
Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination and
Evolution
Limiting factors
Saltation
Natural selection
Golden ages of reptiles and fishes are respectively
Mesozoic and Devonian
Jurassic and Permian
Triassic and Silurian
Palaeozoic and Mesozoic
