Evolution practice · Medium

Identify the phenomenon in which a new set of population is formed from the set of existing population due to the excessive change in the allele frequency

For the MN – blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN – blood group bearing organisms is likely to be:

‘Every cell of the body contributes gemmules to the germ cells and so shares in the transmission of inherited characters’, this theory is known as

Assertion: Analogous structures are different
in appearance with same function.

Reason: Divergent evolution leads to analogy.

Anthropoids were evolved into

Give the name of the first organism who invaded land

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

Which of the following examples supports Lamarckism?

Theory of pangenesis was given by

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.

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?

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

Origin of life occurred in

How many of the given statements are incorrect?
I. The Universe is almost 20 billion years old.
II. Analogy indicates common ancestry.
III. When adaptive radiation has occurred in an isolated geographical area, one can call this convergent evolution.
IV. Natural selection is based on certain observations which are factual.
V. Hardy - Weinberg principle says that allele frequencies in a population are unstable.

Select the odd one among the following w.r.t placental mammals and Australian marsupials.

Assertion: Whales and mammals share
similarites in the pattern of bones of forelimbes.

Reason: These organisms developed along
different directions due to adaptions to different
needs.

If the frequency of an allele ' $B$ ' in a given population is 0.64 , then find out the frequency of other allele ' $b$ ' in the same population which is in Hardy - Weinberg equilibrium

Evolutionary history of an organism is known as

Assertion: The first cells used RNA as their
hereditary molecule.

Reason: DNA evolved from RNA.

Which set includes only analogous organs?

Galapagos islands are located in