In a population of land snails some have dark shells and others have light shells. each morph produces 100ofrings per year, but the dark-shelled morphs live long enough to reproduce for five sessions, whereas the light-shled morphs which are easily seen by bird predators, live to reproduce for only one season. The darwinian fitness of the light-shelled morphs is

In a population of land snails some have dark shells and others have l

1.	In a population of land snails some have dark shells and others have light shells. each morph produces 100ofrings per year, but the dark-shelled morphs live long enough to reproduce for five sessions, whereas the light-shled morphs which are easily seen by bird predators, live to reproduce for only one season. The darwinian fitness of the light-shelled morphs is
Answer» Correct Answer - B

Discussion

No Comment Found

Related InterviewSolutions

Speciation as a smallseries of changes thataccumulate over time, ia known asA. punchuated eequilibriumB. cladisticsC. gradualismD. stasis
Sympatric speciation occurs most commonly inA. mammalsB. fishesC. plantsD. birds
Assertion Disruptive selection is the rarest form of selection Reason Disruptive selection leads to speciationA. Both Assertion and Reason are true, but Reason is the correct explanation of AssertionB. Both Assertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true, but Reason is falseD. Assertion is false, but reason is true
Assertioin Industrial melanism is an example of disruptive selection Reason Evolutionary change in moth is provided by the response of moth species to the directional selection pressure produced by the atmospheric pollutionA. Both Assertion and Reason are true, but Reason is the correct explanation of AssertionB. Both Assertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true, but Reason is falseD. Assertion is false, but reason is true
Industrial melanism is an example ofA. drug resistanceB. darkening of skin due to smoke from industriesC. protective resemblance with the surroundingsD. defensive adaptation of skin against ultraviolet radiations
All the members of a bird population have the same intermediate green colouration. What type of selection is likely to taking place?A. DisruptiveB. DirectionalC. StabilisingD. Natural
Stablising selection favours.A. both extreme of a trailsB. intermediate forms a traitC. environmental differencesD. one extreme form over the other extreme form and over intermediate forms of a trait
The total collection genes, at any time , in a unit of evolution is called theA. genotypeB. demotypeC. multiple allele groupD. dene pool
People who carry an allele for normal haemoglobin and an allele for sickle cell, are resistant to maleria. They are examples ofA. heterozygote advantageB. Extreme diploidyC. outbreedingD. recessive superiority
A new mutation spreads from one population,to another by mean ofA. removed bottlenecksB. emigrants and immigrantsC. mutatioan presuresD. cros overs

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment