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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 situation would most likely lead to allopatric speciation? a. Flood causes the formation of a new lake. b. A storm causes several large trees to fall down. c. A mutation causes a new trait to develop. d. An injury causes an organism to seek out a new food source.

Which description is an example of a phenotype?

a. A certain duck has a blue beak.

b. A mutation occurred to a flower.

c. Most cheetahs live solitary lives.

d. both a and c

If two species eat a different diet but one of the food sources is eliminated and both species are forced to eat the same foods, what change in the hybrid zone is most likely to occur?

Which of the following situations will lead to natural selection?

a. The seeds of two plants land near each other and one grows larger than the other.

b. Two types of fish eat the same kind of food, and one is better able to gather food than the other.

c. Male lions compete for the right to mate with females, with only one possible winner.

d. all of the above

Which situation is most likely an example of convergent evolution?

a. Squid and humans have eyes similar in structure.

b. Worms and snakes both move without legs.

c. Some bats and birds have wings that allow them to fly.

d. all of the above
See all solutions

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