Anthro Human Evolution Theories

Question 1

name 4 postulates of Lamarckism

Accepted Answer

Theory of elan vitae or growthTheory of environment pressure needs and spontaneous formation of organstheory of use and disuseTheory of Inheritance of acquired characters

Question 2

Theory of elan vitae or growth

Accepted Answer

The internal forces of life tend to increase the size of an organism by growth and systems.

Question 3

Theory of environment pressure need and spontaneous formation of organs

Accepted Answer

New organs and systems are formed because of need or want which has arisen due to continuous environment pressure on the organism

Change in environment can bring change in organs.

Infertile and fertile soil relation to plant growth.

Question 4

Theory of use or disuse

Accepted Answer

The development of an organ is directly proportional to its use; continuous use strengthen the organ while disuse weakens it.

Question 5

Theory of inheritance of acquired characters

Accepted Answer

all the changes in organisms acquired during life time are transmitted to the next generation k/a inheritance of acquired characters

Question 6

Mechanism of lamarckism

Accepted Answer

Flowchartin one-note

Question 7

Critics of Theory of elan vitae or growth

Accepted Answer

often evolution proceeded without increase in size rather reduction in sizeMany ferns and conifers which became extinct were once a gigantic tree.

Question 8

Critics of Theory of environment pressure need and spontaneous formation of organs

Accepted Answer

the desire of man can not lead to formation of new structure.Many wanted to fly but never got wings.

Question 9

Critics of Theory of use or disuse

Accepted Answer

heart is not increasing its size inspite of its continuous use.

Question 10

Critics of Theory of inheritance of acquired characters

Accepted Answer

Germplasm theoryCutting mice tail for 20 generation to observe length of tail not getting any shorter. means, Acquired characters (mutilated tails) were not inherited.

Question 11

Germplasm theory

Accepted Answer

Given by August WeismannOrganism is made up of Somatic cell and Germ cell.Somatic cell constitute all body cell except the germ cell of the gonads and they perish with death of animal. Any character acquired by somatic cell is not transmitted to the progeny.The germ cell through gametes of parents are transmitted from parents to offspring and character is transmitted to offspring.

Anthro Human Evolution Theories

name 4 postulates of Lamarckism

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Term	Definition
name 4 postulates of Lamarckism	Theory of elan vitae or growth Theory of environment pressure needs and spontaneous formation of organs theory of use and disuse Theory of Inheritance of acquired characters
Theory of elan vitae or growth	The internal forces of life tend to increase the size of an organism by growth and systems.
Theory of environment pressure need and spontaneous formation of organs	New organs and systems are formed because of need or want which has arisen due to continuous environment pressure on the organism Change in environment can bring change in organs. Infertile and fertile soil relation to plant growth.
Theory of use or disuse	The development of an organ is directly proportional to its use; continuous use strengthen the organ while disuse weakens it.
Theory of inheritance of acquired characters	all the changes in organisms acquired during life time are transmitted to the next generation k/a inheritance of acquired characters
Mechanism of lamarckism	Flowchart in one-note
Critics of Theory of elan vitae or growth	often evolution proceeded without increase in size rather reduction in size Many ferns and conifers which became extinct were once a gigantic tree.
Critics of Theory of environment pressure need and spontaneous formation of organs	the desire of man can not lead to formation of new structure. Many wanted to fly but never got wings.
Critics of Theory of use or disuse	heart is not increasing its size inspite of its continuous use.
Critics of Theory of inheritance of acquired characters	Germplasm theory Cutting mice tail for 20 generation to observe length of tail not getting any shorter. means, Acquired characters (mutilated tails) were not inherited.
Germplasm theory	Given by August Weismann Organism is made up of Somatic cell and Germ cell. Somatic cell constitute all body cell except the germ cell of the gonads and they perish with death of animal. Any character acquired by somatic cell is not transmitted to the progeny. The germ cell through gametes of parents are transmitted from parents to offspring and character is transmitted to offspring.