Evolution practice · Mixed difficulty

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.

The idea that the life originates from pre-existing life is referred as

Phenomenon in which the genetic drift gives rise to a new sample of population is called

What did Miller obtained from his experiment?

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

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

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

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

Human beings belongs to the family-Hominidae which evolved about 24 million years ago. The relative family-Pongidae includes

Links between organisms that shows branching pattern of evolutionary relationships are shown by

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

Which of the follows have not left any evidence of organic evolution?

The theory of special creation has three connotations. Out of these three, one is given below. Pick it out

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

According to one of the most accepted theory, the earth atmosphere before any life had originated consists of ${\mathrm{H}_2}\mathrm{O},{\mathrm{H}_2},\mathrm{N}{\mathrm{H}_2}$ and

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

Birbal Sahni was

Seymouria is the connecting link
between ________.

Evolution is the

Speciation is the evolutionary process by which

Which compound has very important role in prebiotic evolution?

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.

Mutation introduces new genes into a species and brings about the changes in