Definitions / Explanation : Analogous organs & Vestigial or rudimentary organs
Definitions / Explanation : Analogous organs & Vestigial or rudimentary organs
They have almost similar appearance and perform the same function but these develop in totally different groups and are totally different in their basic structure and developmental origin e.g. Wings of butterfly (chitinous), bird (feathered), Pterodactyle and bat (skin fold) serve the same purpose of uplifting the body in air but differ in structure.
$=$ They are the useless remnants of structures or organs which might have been large and functional in the ancestors.
- Vermiform appendix in man, nictitaing membrane, auricular muscles vestigial tail in vertebrates, wisdom teeth, mammary glands in males and body hair are some of its examples.
Similar Questions
$A$ : $A$ single large mutation called saltation can produce new species.
$R$ : Mutations are directional
$A$ : $A$ single large mutation called saltation can produce new species.
$R$ : Mutations are directional
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 |
Evolution is
Evolution is
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 |
Select the incorrect statements
$I.$ Natural selection is essential for evolution
$II.$ Natural selection do not include variations
$III.$ Concept of natural selection was given by Hugo de Vries
$IV.$ Mutation is the sudden inheritable change
$V.$ Synthetic theory is also called Neo-Darwinism theory of evolution The correct combination is a
Select the incorrect statements
$I.$ Natural selection is essential for evolution
$II.$ Natural selection do not include variations
$III.$ Concept of natural selection was given by Hugo de Vries
$IV.$ Mutation is the sudden inheritable change
$V.$ Synthetic theory is also called Neo-Darwinism theory of evolution The correct combination is a