Explain giving an example of how the following provides evidence in favor of evolution in organisms. (i) Homologous organs (ii) Fossils
Explain giving an example of how the following provides evidence in favor of evolution in organisms. (i) Homologous organs (ii) Fossils
(i) Homologous organs:
1. These organs have the same structure and embryonic lineage but perform various functions.
2. Similar structures indicate that all these animals have a common ancestor.
Examples: Front legs of frogs and flippers
The flippers are used for swimming, and the frog's forefoot is used for jumping.
(ii) Fossil:
1. They are the residues of past creatures concealed in sedimentary rocks. Fossils show how evolution took place through a step-by-step method from simple life forms to the formation of complex life forms.
Example: Fossil of Archaeopteryx
The fossil Archaeopteryx looks like a bird but shares many other traits found in reptiles. This observation indicates that birds evolved from reptiles.
(i) Homologous organs:
1. These organs have the same structure and embryonic lineage but perform various functions.
2. Similar structures indicate that all these animals have a common ancestor.
Examples: Front legs of frogs and flippers
The flippers are used for swimming, and the frog's forefoot is used for jumping.
(ii) Fossil:
1. They are the residues of past creatures concealed in sedimentary rocks. Fossils show how evolution took place through a step-by-step method from simple life forms to the formation of complex life forms.
Example: Fossil of Archaeopteryx
The fossil Archaeopteryx looks like a bird but shares many other traits found in reptiles. This observation indicates that birds evolved from reptiles.
