Evolution practice · Medium

An organism which is the connecting link between the animals and plants is

Genetic basis of adaptation was performed by

Hardy –Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination and

Choose the odd one w.r.t. convergent evolution of Australian marsupials and related placental mammals.

Assertion: The theory of survival of the fittest
is widely misunderstood.

Reason: Evolution does not always increase the
chances of a species survival and species do
not survive when such chances happen rapidly

Assertion: Mutations cause evolution.

Reason: Ancon sheep and hornless cattle are
developed by inducing mutation.

Assertion : The process of speciation occurs
only in allopatric populations.

Reason : The sympatric species can arise either
to changes in the chromosome number or due
to introgressive hybridization and polyploidy.

Evolutionary changes does not come about at the level of individual but at the level of

England in 1850s, i.e., before industrialization set in, it was observed that there were more white-winged moths on trees than dark-winged or melanised moths.
However, in the collection carried out from the same area, but after industrialization, i.e., in 1920, there more dark-winged moths in the same area, i.e., the proportion was reversed
Predict the possible reason for such change

Scientist who also came to the similar conclusions around the same time of Charles Darwin was

Choose the odd one w.r.t convergent evolution

How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

Microbial experiments show that …A… advantageous …B… when selected will result in observation of new phenotypes. Over few generations, this would result in …C… . Natural selection is a process in which …D… variations enabling better survival are enabled to reproduce and leave greater number of progeny
Choose the correct option for A, B, C and D to complete the given NCERT statement

If the frequency of dominant allele is 60%, find out the percentage of heterozygous individuals in the population

Given below some major events in the early history of life
I. First heterotrophic prokaryotes
II. First eukaryotes
III. First autotrophic prokaryotes
IV. First animals
Choose the correct sequence of these evolutionary events

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

According to the Neo-Darwinian theory, which of the following is responsible for the origin of new species?

Birbal Sahni was

Speciation is the evolutionary process by which

Continuity of germplasm’ theory was given by

Organic evolution is also called

Which of the following in birds indicates their reptilian ancestry?

A microsphere is a …A… collection of organic macromolecules with double layered outer boundary. The term microsphere was given by …B…
Complete the given statement by choosing correct options for A and B with reference to NCERT textbook

The gases condensed under …A… and formed the galaxies of the present day universe. In the solar system of the milky way galaxy, earth was supposed to have been formed about …B… back. There was no atmosphere …C… on the earth. Water vapour, …D… carbon dioxide and ammonia released from molten mass covered the surface.
Choose the correct option for A, B, C and D to complete the given paragraph with reference to NCERT textbook

Survival of the fittest is the basic principle of a competition. Its importance in organic evolution was explained by

Given below are four statement (A - D) each with one or two blanks. Select the option which correctly fill up the blanks in 2 statements

A) Wings of butterfly and birds looks like and are results id ___(i)___ evolution

B) Miller showed that and ___(i)___, when exposed to electric discharge in a flask resulted in formation of ___(ii)___

C) Vermiform appendix is a ___(i)___ organ and an ___(ii)__ evidence of evolution

D) According to Darwin evolution took place due to ___(i)___ and ___(ii)___ of the fittest

Big-Bang theory attempts to explain the origin of

Reproductive isolation is to speciation as selection is to:

The force responsible for fixing in population of neutral characteristics is

Arrange the following events of modern concept of evolution sequentially: I. Genetic variations in population, II. Natural selection, III. Heredity IV. Isolation ,V. Speciation.  The correct option is