Question

ASSERTION (A) All present day living
organisms are related to each other
and also to all organisms that ever
lived on this earth.
Reason (R): Humans give recognition of
the sharing of similarities among living
organisms both horizontally and
vertically​

Answer 1

Answer:

hi..................................,....

Answer 2

The Assertion (A) and Reason (R) both are correct but R is not the correct explanation for A.

• Every organism, as we know, contains a few common biological molecules, which are nothing more than genetic material like DNA and RNA.
• Each DNA strand doubles and serves as a template for the formation of new, complementary DNA during the replication process.
• However, each newly created DNA also inherits one strand from its parent DNA.
• We can therefore claim that every creature is connected to one another because new cells are linked to older ones whenever they are formed.
• Hence the assertion is correct.
• The relationships between species in the present are horizontal relationships; by grouping the organisms that exist today, one can define species in this way (or at any other time "slice").
• By comparing the skulls of two different species, such as those of a human and a chimpanzee, you may compare species horizontally.
• Vertical relationships are those that exist between present-day species and extinct species.
• For instance, you may contrast the skull of Mesohippus with the skull of a modern horse.
• Hence the reason on its own is correct.
• But the R is not the correct explanation of A.

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