Evolution practice · Mixed difficulty

Assertion: Atavism is the reappearance of
disappered ancestral characters.

Reason: Third molars and hair on body are
examples of atavism.

Which of the following is not an examples of adaptive radiation?

Which of the following examples supports Lamarckism?

Theory of pangenesis was given by

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?

Which of the following is/are the most significant trend in the evolution of humans:  I. Shortning of eye,  II. Bionocular vision,  III. Tool making,  IV. Increased cranial capacity.

Flippers of seal are

Which group of organisms is believed to be evolved first on earth?

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.

Assertion: Founder effect may lead to formation
of new species.

Reason: Founders carry all the parental gene
pool to a new location.

Assertion (A): Excess use of herbicides, pesticides has resulted in selection of resistant varieties in a much lesser time.

Reason (R): This evolution is due to non-anthropogenic action.

Natural selection is a process in which …A… variations enables better survival and ability to …B… and leave …C… number of progeny
Choose the correct options for A, B and C to complete the given NCERT statement

In a random mating population, frequency of disease causing allele is 80%. What would be the frequency of carrier individuals in that population.

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.

Origin of life as a result of chemical evolution was properly explained by
I. Fox II. Oparin
III. Wateson IV. Haeckel
V. Mendel VI. Crick
Choose the correct option

A gene locus has two alleles $X$ and $Y$; if the frequency of dominant allele $X$ is 0.5 , then what will be the frequency of heterozygous individuals in the population which is in Hardy-Weinberg equilibrium?

The sequence of origin of life could be

Organic evolution meansS

Arrange the periods of Palaeozoic era in ascending order in a geological time scale.

Coacervates belong to category of

Which of the following situation would most likely result in the highest rate of natural selection?

Prodigality of reproduction in Darwinism refers to

Which of the following refer to correct examples of organisms, which have evolved due to changes in environment brought about by anthropogenic action?
a) Darwin’s Finches of Galapagos islands.
b) Drug resistant eukaryotes.
c) Herbicide resistant weeds.
d) Adaptive radiation of marsupials in Australia.

Biological concept of species is mainly based on

S L Miller’s closed flask contained

Origin of life occurred in

Development of different functional structures from a common ancestral form is called

Proteinoids are