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

Explain the penicillium - fungi, Explain the Penicillium - Fungi? Class...

Explain the Penicillium - Fungi? Classification Kingdom - Mycetae Division - Amastigomycota Class - Ascomycetes Subclass - Plectomycetidae Order - Eurotiales

Explain continuous full - thickness incision, Q. Explain Continuous full - ...

Q. Explain Continuous full - thickness incision? Continuous full - thickness incisions are indicated for a variety of situations outlined below. This type of incision may be us

Meal planning and nutrient needs of fast-growing infants, Define meal plann...

Define meal planning and nutrient needs of fast-growing infants? We just got to know the meal planning and nutrient needs of fast-growing infants and preschoolers in the previo

What are changes in st-segment, Q. What are changes in ST-Segment? Nor...

Q. What are changes in ST-Segment? Normal Exercise Electrocardiogram ST and J Point As the heart rate increases with exercise, a number of predictable changes occur in a

Explain about the functional properties of proteins, Explain about the Func...

Explain about the Functional Properties of Proteins? It may be clear by now that functionality (as implied to food ingredients) refers to 'any property aside from the nutrition

How does the Cornea work, How does the Cornea work, I heard that it is like...

How does the Cornea work, I heard that it is like a motor, however i''m not too sure... because a motor is in vehicle and has piston, and the Cornea is in our eyes and... Well does

Operative requirements for stage i surgery, Operative requirements for stag...

Operative requirements for stage i surgery Although Implant placement under general anesthesia must be done in an operating theatre with complete resources, most implant surger

Show complications of mitral stenosis, Q. Show Complications of Mitral Sten...

Q. Show Complications of Mitral Stenosis ? Hemoptysis It is a common complication in patients with mitral stenosis and is related to the severity of mitral stenosis. Pulm

Excretion in amoeba, EXCRETIO N IN AMOEBA - NH 3  is excreted out t...

EXCRETIO N IN AMOEBA - NH 3  is excreted out through plasmalemma. Osmoregulation takes place by contractile vacoule, generally one, towards posterior end, contractile in

Cutaneous respiration in frog, Cutaneous respiration in frog Frog be...

Cutaneous respiration in frog Frog belongs to class Amphibia under vertebrates. It is an amphibious animal which can live both on land and in water. Skin is very impor

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