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Chapter 18: Q.4 (page 464)

Which scientific concept did Charles Darwin and Alfred Wallace independently discover? a. mutation b. natural selection c. overbreeding d. sexual reproduction

Short Answer

Expert verified
Natural selection is offered as option (b).
Through their investigation, Darwin and Wallace independently identified and suggested the mechanism of evolution by natural selection.
As a consequence, (b) is the proper response.

Step by step solution

01

Introduction

CharlesDarwinandAlfredRusselWallacemadesignificantcontributionstothefieldofevolutionbyexplaininghowevolutionworks.
Darwin explored the globe, and his visit to the Galapagos Islands aided in the understanding of evolution.
Wallace went to Brazil on his own to investigate the same topic.
02

Explanation for correct option

Naturalselectionisofferedasoption(b).
DarwinstudiedthevarioussizesandshapesofbeaksamongthefinchesintheGalapagosIslands.
Darwindiscoveredthatdifferenttypesofbeaksassistedbirdsinacquiringspecifictypesoffoodafterfurtherinvestigation.
Thiswasattributabletothefinches'evolutionfromtheirancestralspeciesovertime.
Natural selection was the name he gave to this system of adaptation in which desirable features aid in their survival and reproduction.
Wallace also gathered a large number of insect, bird, and animal specimens, examined them, and authored essays explaining the origins of new species with improved survival features.
03

Explanation for incorrect option

Option(a)hasamutationattachedtoit.
HugoDeVrieshadproposedit.
Asaresult,itisaninaccurateresponse.
Overbreedingislistedasoption(c).
Itistheoverbreedingofaspecies,yetneitherCharlesDarwinnorAlfredRusselWallaceproposeditindependently.
Asaresult,itisaninaccurateresponse.
Sexualreproductionispresentedasoption(d).
Itisatypeofreproductionthatinvolvestwoparents,gametecreation,andfusiontoproducenewoffspring.
CharlesDarwinandAlfredRusselWallacedidnotindependentlyproposeit.
As a result, it is an inaccurate response.
As a result, alternatives (a), (c), and (d) are wrong.

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Most popular questions from this chapter

Which of the following statements is false? a. Punctuated equilibrium is most likely to occur in a small population that experiences a rapid change in its environment. b. Punctuated equilibrium is most likely to occur in a large population that lives in a stable climate. c. Gradual speciation is most likely to occur in species that live in a stable climate. d. Gradual speciation and punctuated equilibrium both result in the evolution of new species.

Why can polyploidy individuals lead to speciation fairly quickly?

What is the main difference between dispersal and vicariance?

a. One leads to allopatric speciation, whereas the other leads to sympatric speciation.

b. One involves the movement of the organism, and the other involves a change in the environment.

c. One depends on a genetic mutation occurring, and the other does not.

d. One involves closely related organisms, and the other involves only individuals of the same species.

If a person scatters a handful of garden pea plant seeds in one area, how would natural selection work in this situation?

Which is most likely to survive, offspring with 2n+1 chromosomes or offspring with 2n-1chromosomes?
See all solutions

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