Evolution practice · Mixed difficulty

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

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.

Which one of the following amino acid was not found to be synthesized in Miller’s experiment?

The loss of energy as one proceeds from one trophic level to the next higher level is approximately

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

Which of the following pairs is odd one ?

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

Evolution of DDT resistant mosquitoes is an example of

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.

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:

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

Artificial selection is shown in

Assertion: Pouched mammals of Australia survived by continental drift.

Reason: It is because of lack of competition from any other mammals.

Evolutionary history of an organism is known as

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

Reason: DNA evolved from RNA.

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

Which set includes only analogous organs?

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

Change of frequency of alleles in a population results in evolution. This statement is proposed in

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.

Galapagos islands are located in

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

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

In a random mating population in equilibrium, which of the following brings about a change in gene frequency in non-directional manner?

Genetic basis of adaptation was performed by

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

Struggle for existence and survival of the fittest theories were given by

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