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CBSE Class 12-science Answered

Please solve this doubt , iam not able to find the solution anywhere
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Asked by swaghacker204 | 11 Nov, 2023, 09:13: AM
answered-by-expert Expert Answer
Nuttal performed antigen- antibody test/ blood precipitation test/serological test to establish the inter-relationships among different animal groups. The test is based on the fact that mismatched/foreign blood initiates antibody production. This antihuman serum is poured in different organisms. The closer is the organism to human, the more will be the precipitate formation with antihuman serum.
Since the 64% precipitate is formed in gorilla, it is closely related to humans than jackal and sheep.
Both jackal and sheep show similar 10% precipitate formation indicating that they both are closely related.
So,  the correct answer is option D - both a and b.
Answered by Sheetal Kolte | 13 Nov, 2023, 01:53: PM

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CBSE 12-science - Biology
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