Give difference Amongest Lamarckism, Darwinism and Mutation Theory.
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. |
Similar Questions
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
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 |
Assertion : Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits.
Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.
Assertion : Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits.
Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.
- [AIIMS 2012]
How do you express the meaning of words like race, breed, cultivars or variety ?
How do you express the meaning of words like race, breed, cultivars or variety ?
Match the following.
Column $- I$
Column $- II$
$(A)$ Lamark
$(p)$ Finch bird
$(B)$ De Vries
$(q)$ Evening primerose
$(C)$ Darwin
$(r)$ Giraffes
$(s)$ Melanic moths
Match the following.
| Column $- I$ | Column $- II$ |
| $(A)$ Lamark | $(p)$ Finch bird |
| $(B)$ De Vries | $(q)$ Evening primerose |
| $(C)$ Darwin | $(r)$ Giraffes |
| $(s)$ Melanic moths |
Match the columns :
Column - $I$
Column - $II$
$(1)$ Mutation
$(a)$ Change in population allele frequencies due to chance alone.
$(2)$ Gene flow
$(b)$ Difference insurvival and reproduction
$(3)$ Natural selection
$(c)$ Immigration, emigration change allele frequencies.
$(4)$ Genetic drift
$(d)$ Source of new alleles.
Match the columns :
| Column - $I$ | Column - $II$ |
| $(1)$ Mutation | $(a)$ Change in population allele frequencies due to chance alone. |
| $(2)$ Gene flow | $(b)$ Difference insurvival and reproduction |
| $(3)$ Natural selection | $(c)$ Immigration, emigration change allele frequencies. |
| $(4)$ Genetic drift | $(d)$ Source of new alleles. |