Explain the lamarcks theory in evolution, Biology

Assignment Help:

Explain the Lamarck's Theory in evolution?

Prior to Darwin, most people believed in and held to the creationist viewpoint that species were created in their current forms, which have not changed. In 1809, Jean Baptiste Lamarck proposed a new theory of evolution. He used the fossil record to explain how different adaptations arose.

Lamarck's theory incorporated the following ideas. He thought that organisms had an "inner need" to become better adapted to their environments. This, he thought, would explain the trend that organisms had toward greater and greater complexity observed in the fossil record. Secondly, Lamarck, along with others, felt that organisms are able to gradually lose characteristics that were not used over time, and further, that they could develop those characteristics that were "needed" to aid in their survival. Lastly, Lamarck thought that these newly acquired characteristics, or traits, could be passed on to future generations - this came to be known as the inheritance of acquired traits.

Today, of course, we know that there is no evidence that supports Lamarck's theory. Increasing muscle mass and strength by exercise does not alter the gene that carries that trait. This means that a runner who trains and develops running prowess is not able to pass on acquired increased muscle mass and strength to his or her offspring. Although Lamarck's Theory was ultimately replaced, Lamarck is still credited with formulating a plausible theory that was accepted by many.

 

 


Related Discussions:- Explain the lamarcks theory in evolution

How the slides and specimens used as instructional resources, Explain how t...

Explain how the slides and specimens used as instructional resources?  Ans) They act as an Identifier, so that we can judge them simply

Phylum protozoa, what are the classfication and members af phylum protozoa

what are the classfication and members af phylum protozoa

Why do vestigial structures persist in modern organisms, Why do vestigial s...

Why do vestigial structures persist in modern organisms? Explain the evidence that indicates that species evolve over time. The environment will not select for or against

Describe the functionality of implant material, Functionality of implant ma...

Functionality of implant material It should take maximum advantage of available bone and permit the maximum amount of forces to be transmitted through the implant within physio

What are the major structures within the cell nucleus, Within the cell nucl...

Within the cell nucleus the major structures are: the nucleolus, an optically dense region, spherical shaped, where there are concentrated ribosomal RNA (rRNA) associated to protei

Zoology, give detail account of modes of locomotion in protozoa and describ...

give detail account of modes of locomotion in protozoa and describe various type of asexual reproduction in protozoa

Calculate frequencies of heterozygotes, If dimples may be considered a sing...

If dimples may be considered a single-gene dominant trait, and 64% of the population features dimples, calculate the frequencies of heterozygotes and both types of homozygotes, ass

What do you mean by overgloves, Q. What do you mean by Overgloves? The ...

Q. What do you mean by Overgloves? The purpose of these gloves is to use time more efficiently and to protect the skin on the hands through minimizing the number of times that

Evaluation of health services, CONCEPT AND MEANING OF EVALUATION: Eval...

CONCEPT AND MEANING OF EVALUATION: Evaluation of programmes is critical for measuring various community health services The ultimate reasons for doing evaluation is to ensure

Assessment of infective endocarditis, Assessment   Infective endocardit...

Assessment   Infective endocarditis  is characterised  by insidious onset of fever, malaise, night- sweats and weight loss. Other signs include vomiting, fatigue, headache, mya

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd