Evolution practice · Hard

According to cosmozoic theory origin of life occurs on earth by :

Although Darwin's natural selection theory well explained about evolution but there are some draw back. What is the Drawback of Darwinsm?

From the statements given below, which one most likely represents an example of disruptive selection.

I. Industrial melanism in peppered moth.

II. Population of butteréiesthat are either all yellow or all blue.

III. Population of rabbits that evolves more body fat in response to a cold climate.

IV. Population of wrens that evolves to be smaller at sexual maturity in response to predation pressure.
V. Very tall and very short pine trees being removed from a population by herbivore.

In a population of 400 individuals, frequency of recessive allele is $40 \%$. Find out which of these represents the total number of individuals with dominant phenotype?

[A]: Macro evolution produces groups of parallel special adaptations among convergent but related species.

[R]: Adaptive radiation/macroevolution don't produce evolutionary lines that converge in special adaptation with other related groups differing in general adaptation.

Which of the following statements are correct? I. Survival of the fittest is based upon the characteristics that are inherited,  II. Darwin’s variations are small and directional,  III. The fitness is the end result of the ability of adaptation,  IV. Genetic drift is operated in small population,  V. Genetic drift operates in large population,  VI. Genetic drift upset the Hardy-Weinberg equilibrium.  Choose the correct option

Who among the following talked about natural selection as mechanism of evolution?

Which of the following statements are incorrect.  I. Microbial experiment shows that when the pre-existing advantagoeus mutations are selected they will result in the observation of new phenotypes. Over few generations, this would results in speciation,  II. Neanderthal fossils represents a human relative,  III. In 1938, a fish caught in South Africa happened to be a coelacanth (lobe fins) which was thought to be extinct. These animals evolved into the first living amphibian on both land and water,  IV. Lichens can be used as water pollution indicators,  V. Alfred Wallace, a naturalist, who worked in Malay Archepalago (present Indonesia) had also came to the similar conclusion on natural selection as reached by Darwin.  The correct option is

The atmosphere of early earth probably contained no $\mathrm{O}_2$ until the emergence of organisms that:

Artificial selection is shown in

Statement A: Analogous structures are a result of convergent evolution.
Statement B: Single step large mutation is termed saltation.

Assertion (A): Darwin held that small favourable variations formed raw material for evolutions.
Reason (R): Darwin did not study the factors which produce variations.

The water of primitive ocean during the time of “Origin of
life”, has been called “hot dilute soup of organic
substances” by

Assertion : A sickel-cells anaemia is an example
of natural selection in human population.

Reason : It saves Africans from fatal disease of
malaria in heterozygous condition.

Which phenomena confined the pouched mammals of Australia survived because of lack of competition from any other mammals?

Which of the following is correct match w.r.t. human ancestor, its cranial capacity and certain feature?

In a given population, the …A… of occurrence of alleles of a gene is supposed to remain …B… and even remain the same through generations. Hardy-Weinberg principle stated it using …C… equation.  Choose the correct option for A, B and C to complete the given NCERT statement

Seymouria is the connecting link
between ________.

Read the following statements and find out incorrect statements:

A) Devonian and carboniferous periods are under palaeozoic era.

B) Archaeopteryx is connecting link between reptiles and mammals.

C) Dryopithecus and Ramapithecus - about 2 mya.

D) Cranial capacity of Neanderthal man is 1400 CC.

In the evolution of man, several change occurred in the ancestral characters. Which one of
the following changes is irrelevant in this context?

Present concept of evolution is the result of the work by number of scientists:  I. T Dobzhansky,  II. RA Fisher,  III. JBS Haldane,  IV. Charles Darwin, V. Sewall Wright,  VI. Ernst Mayer, VII. Hugo de Vries, VIII. GL Stebbins, IX. Lamarck.  The scientists who contributed to the present concept of evolution are

Anthropogenic actions that leads to evolution is the use of

Select the correct statement.

Statement-I: Natural selection fixes the character with adaptive value and operates both in small and larger populations.

Statement-II: Natural selection increases the fitness of an organism by increasing the frequency of adaptive alleles and decreasing the frequency of deleterious alleles.

The correct order of the geologic eras, from most ancient to most recent, is

The branch of science dealing with process of improvement of human race by selective breeding is called:

Reproductive isolation in sympatric speciation develops without a

Select the correct group/set of Australian Marsupials exhibiting adaptive radiation.

Statement-I: The first formed earth originally had reducing atmosphere.

Statement-II: Hydrogen was abundant and there was no free ${O}_2$.

[A]: Mesozoic era is known as the 'Age of Reptiles'.
[R]: It was the era of origin, differentiation and final extinction of dinosaurs which thrived in sea, in air and on land.