Forelimbs of cat, lizard used in walking, forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of:

In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in...

The wings of a bird and the wings of an insect are :

A population will not exist in Hardy-Weinberg equilibrium if

Industrial melanism is an example of -

Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism ?

Which of the following had the smallest brain capacity ?

Give the correct descending order of organisms with reference to their estimated number found in Amazon forest. (a) Plants (b) Invertebrates (c) Fishe...

Select the correct statement regarding mutation theory of evolution.

The factor that leads to Founder effect in a population is :

Match List-I with List-II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...

From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask

Flippers of Penguins and Dolphins are examples of

Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action...

The concept of ''Omnis cellula-e cellula'' regarding cell division was first proposed by :

Variations caused by mutation, as proposed by Hugo de Vries, are :

Match the hominids with their correct brain size : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-style:solid;border-width:0px;font-...

In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the in...

Among the following sets of examples for divergent evolution, select the incorrect option.

The similarity of bone structure in the forelimbs of many vertebrates is an example of

According to Hugo de Vries, the mechanism of evolution is

Genetic drift operates in

In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by

The chronological order of human evolution from early to the recent is

Which of the following is the correct sequence of events in the origin of life ? I. Formation of protobionts II. Synthesis of organic monomers III. Sy...

Which of the following structures is homologus to the wing of a bird ?

Analogous structures are a result of :

Following are the two statements regarding the origin of life - (a) The earliest organisms that appeared on the earth were non-green and presumably an...

Random undirectional change in allele frequencies that occur by chance in all populations and especially in small populations is known as :-

Genetic variation in a population arises due to :

Dinosaurs dominated the World in which of the following geological era ?

The finch species of Galapagos Islands are grouped according to their food sources. Which of the following is not a finch food ?

According to Darwin, the organic evolution is due to -

The tendency of population to remain in genetic equilibrium may be disturbed by :

Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as :

The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challen...

The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function, This is an example of :

The idea of mutations was brought forth by :

Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as

Which one of the following options gives one correct example each of convergent evolution and divergent evolution ?

What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors ?

The extinct human who lived 1,00,000 to 40,000 years ago, in Europe, Asia and parts of Africa, with short stature, heavy eye brows, retreating fore he...

What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors ?

Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements – Statemen...

The most apparent changes during the evolutionary history of Homo sapiens is traced in

Darwin's finches are a good example of –

Peripatus is a connecting link between :

In the case of peppered moth (Biston betularia) the black-coloured from became dominant over the light-coloured form in England during industrial revo...

Darwin's finches are a good example of –

Thorn of Bougainvillea and tendril of Cucurbita are examples of:

Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin o...

Which one of the following scientist's name is correctly matched with the theory put fourth by him?

The concept of chemical evolution is based on-

Adaptive radiation refers to:-

The finches of Galapogas islands provide an evidence in favour of-

When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed:-

Which one of the following statements is correct?

Which one of the following amino-acids was not found to be synthesized in Miller's experiment ?

An important evidence in favour of organic evolution is the occurrence of-

Praying mantis is a good example of-

Jurassic period of the Mesozoic era characterized by-

De Vries gave his mutation theory on organic evolution while working on -

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter ?

There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of varia...

Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution ?

Which of the following is not true for a species ?

At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating populati...

Which of the following is the relatively most accurate method for dating of fossils ?

Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More p...

What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes ?

According to oparin, which one of the following was not present in the primitive atmosphere of the earth ?

Which one of the following is living fossil ?

Diversification in plant life appeared

Convergent evolution is illustrated by : -

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution ?

Random genetic drift in a population probably results from

Industrial melanism is an example of : -

In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner : -

Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution ?

Which one of the following is categorised under living fossils ?

Which one of the following describes correctly the homologous structures ?

Cause of mimicry is -

There is no life on moon due to the absence of -

Which of the following is important for speciation ?

Genetic drift oparates in : -

Which of the following are homologous organs ?

Sequence of which of the following is used to know the phylogeny ?

According to fossils which discovered up to present time, origin and evolution of man was started from

In which condition, the gene ratio remains constant for any species population ?

In which era reptiles were dominant ?

Which statement is correct about centre of origin of plant ?

Half life period of C14 is : -

Reason of diversity in living being : -

Most abundant organic compound on earth is

Similarities in organism with different genotype indicates : -

Which of the following is closest relative of man ?

Which of the following is correct order of the evolutionary history of man ?

First life on earth was : -

Forthcoming generations are less adaptive than their parental generation due to

Occurrence of endemic species in South America and Australia is due to

Darwins theory of pangenesis shows similarity with theory of inheritance of acquired characters then what shall be correct according to it

Which is not a vestigial organ in man ?

Character which is closely related to human evolution

Which evidence of evolution related to Darwin's finches ?

Homo sapiens have evolved in

Who is directly related to man ?

Which is the most important factor for continuity of a species from evolutionary point of view ?

Which one of the following are analogous structures?