Give difference Amongest Lamarckism, Darwinism and Mutation Theory.
Properties | Lamarckism | Darwinism | Mutation Theory |
$(a)$ Vital force | The theory believes that every organism has an internal vital force that tends to increase its size upto a certain limit. | Darwinism does. not believe in internal vital force. | No internal vital force is involved. |
$(b)$ Conscious Reaction |
Animals with well developed nervous system react consciously to any change in environment. | Darwinism does not involve any conscious reaction. | No conscious reaction is belived to take part in the process of evolution. |
$(c)$ Appetency | The theory considers appetency or desires on the part of animals an important force in the development of modifications. | It is not a constituent of the theory. | Appetency is not involved. |
$(d)$ Use and disuse | The organs put to more use are believed to develop more while organs not used begin to degenerate. | The theory is silent about use and discuss of organs. | The theory is silent about it. |
How do you express the meaning of words like race, breed, cultivars or variety ?
Definitions / Explanation : Analogous organs & Vestigial or rudimentary organs
Match the columns :
Column - $I$ | Column - $II$ |
$(1)$ Human embryos have gill | $(a)$ Chemical evolution |
$(2)$ Oparin and Haldane | $(b)$ Stimulation experiment |
$(3)$ Miller and uray | $(c)$ Wings of bird and butterfly |
$(4)$ Analogous organ | $(d)$ Outogeny repeats phylogeny |
Evolution is