21) Levels of homology exist in all living organisms and discuss in detail with different kinds of homology exist with suitable examples

-

 

QUESTION-21) Levels of homology exist in all living organisms and discuss in detail with different kinds of homology exist with suitable examples


ANSWER: 

Homology looks at the similarities that exists in living organisms in order to determine common ancestry. The similarities can be in the genes, physical appearance or function of structures. Examples of this include the front limbs of birds, bats, humans and lizards since they have the same structure.

 characters in different organisms that are similar because they were inherited from a common ancestor that also had that character. An example of homologous characters is the four limbs of tetrapods. Birds, bats, mice, and crocodiles all have four limbs. Sharks and bony fish do not.

An example of homologous structures are the limbs of humans, cats, whales, and bats. Regardless of whether it is an arm, leg, flipper or wing, these structures are built upon the same bone structure. Homologies are the result of divergent evolution.


Comments

Post a Comment

Popular posts from this blog

biology fat answers by krish

-
Image
krish creations " module-1     click here   : module-2     click here   module-3  1.     1.)   Outline the classification of proteins based on the polarity and how are they further classified based on the presence of the R-groups present in the amino acid structure?  click here for answer 2.       2.) What determines the structure and function of the proteins? click here for answer 3.      3.) Fill in the following table with ‘Y’ to indicate ‘yes’ and ‘N’ to indicate ‘no’ for each box as it pertains to each listed amino acid in each category. Some of the names are given only as their three-letter abbreviations. Amino Acid Nonpolar Polar Acidic Side Chain Basic Side Chain Essential? Proline  Y  N  N  Y  N Cys  Y  N  Y  N  N Asp  N  Y  Y  N  N Serine  N  Y  Y  N N  Gln  N  Y  N Y   N 1.        4.  Name the four different types of interactions responsible for               creating tertiary structures in proteins and elaborate the     
Read more

Difference between Prokaryotic cell and Eukaryotic cell, Differences Between Plant Cell and Animal Cell ,Fluorescence microscope principle ,ray diagram and instrumentation

-
Image
krish creations   1.)  Difference between Prokaryotic cell and Eukaryotic cell. Prokaryotic cells are primitive cells mainly found in the unicellular organisms, and they do not nucleus, instead they contain a fragment of DNA, and the organelles are not bounded by the membranes, where as the eukaryotic cells are found in all types of multicellular organisms such as plant and animal cells and they contains nucleus and membrane bound organelles. Prokaryotic cells Eukaryotic cells This cells are always unicellular Eukaryotic cells are present as either unicellular or multicellular. The size of cell is generally range from 0.2 micrometers to 2.0 micrometers in diameter Eukaryotic cells range from 10 to 100 micrometers in diameter. In prokaryotic cells, the cell wall is present and it is very complex in nature. Eukaryotic cells have cell walls very rarely, if present they have simple chemical nature. In this cells true nucleus absent, instead nucleotide is present True nucleus is present. DN
Read more