Get premium membership and access questions with answers, video lessons as well as revision papers.

Discuss Lamarck’s and Darwin’s theories of evolution

      

Discuss Lamarck’s and Darwin’s theories of evolution

  

Answers


edwin

Larmarck’s theory states that when the environment demands the need or use of a particular structure in the body; the body develops it in response; for example giraffes used to have short necks; when all the grass was exhausted, they started stretching their necks in search of leaves on trees; therefore they developed long necks; which then were inherited by their offspring; however, when a structure is not continually used, it reduces in size and becomes dysfunctional; this theory fails to explain how acquired characteristics become inherited; Darwin’s theory suggests that in nature there occur struggle for existence; only those individuals with the desired adaptations survive; those poorly adapted fail to compete; and become extinct; there also occurs variation in nature; where organisms with desired adaptations pass on their characteristics to offspring during reproduction; those poorly adapted fail to reach maturity; and do not reproduce; therefore, nature selects for individuals best suited to an environment; and against those poorly adapted (natural selection); as there occurs survival of the fittest
Edwinnyongesa8 answered the question on December 4, 2018 at 03:44


Next: Describe the process of secondary thickening in a woody stem
Previous: Describe how the various supportive tissues in plants adapt them to their habitats

View More Biology Questions and Answers | Return to Questions Index


Learn High School English on YouTube

Related Questions