Human evolution, Science

Assignment Help:

Human Evolution:

Charles Darwin in  the 'Origin of Species' gave a lilechanism for the evolution of  plants and animals in general, even  though he had speculated about the origin of man. Four years later, he published  the "Descent of Man",  in which he speculated that like other animals, man too had evolved form pre-existing  living forms. Darwin was greatly impressed by  the similarities in  the bodily structure of man and thegreat African apes, the Chimpanzee and the Gorilla.

From this, he speculated on the location of man's origins. In his own words, "In each great region of  the world, the living mammals are closely related to the extinct species of  the same region.  It  is, therefore, probable that Africa was formerly inhabited by extinct apes, closely allied tothe gorilla and chimpanzee; and as these two species are now man's nearest allies, it is somewhat more than probable, that our early ancestors lived on the African  continent than elsewhere". Darwin had noted that embryos, i.e.  early unborn young ones, of  different organisms pass through very similar stages. However, small alterations in the timings of  events in early development might produce a substantial change in the mature organism; for example in many ways adult humans are like juvenile apes,  their small faces and globular cranium bones enclosing the brain  are indicative of  this.

 

953_Human Evolution.png

A  crucial step in human evolution, enlargement of  the brain, can be seen as a result of  the slowing down of  development  in the embryo of  an ape-like ancestor. Instead of stopping at birth, brain growth continues well  into childhood, eventually producing a much larger and more complicated piece of  mental machinery. 


Related Discussions:- Human evolution

Light year, 4 light years( its distance is0

4 light years( its distance is0

#titleperiodic table, how do we arrange element in a periodic table

how do we arrange element in a periodic table

Define the regulation of glucocorticoid secretion, Define the Regulation of...

Define the Regulation of Glucocorticoid Secretion Glucocorticoid secretion is mainly controlled by ACTH or adrenocorticotropic hormone from the anterior pituitary gland. In any

Volanoes, what are the causes of volcanic eruption ?

what are the causes of volcanic eruption ?

Explain the monochromates or total colour blindness, Explain the Monochroma...

Explain the Monochromates or Total Colour Blindness The monochromate individuals lack all cone pigments and cannot distinguish colours at all. They find bright light very unple

Explain the anterior pituitary, Explain the Anterior Pituitary The ante...

Explain the Anterior Pituitary The anterior pituitary gland or adenohypophysis consists of three types of cells - acidophils, basophils and chromophores according to their stai

Emergence of science, Emergence of Science: We gave you a glimpse of ...

Emergence of Science: We gave you a glimpse of  the social structure in  India during the Iron Age. With the emergence of ordered urban societies, the stage was set for a tre

What is competitive inhibition, Competitive inhibition This  type of in...

Competitive inhibition This  type of inhibition takes place when  a  compound having  a strong structural resemblance to the substrate competes with  it for the catalytic  site

The fujita scale is used to classify intensities of, The Fujita Scale is us...

The Fujita Scale is used to classify intensities of: Tornadoes

Describe wet bulb thermometer, Question: a) Describe wet bulb thermomet...

Question: a) Describe wet bulb thermometer and wet bulb temperature. b) What happens to the volume of a rising parcel of air and of a sinking parcel of air? c) What do yo

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