Question

All living organisms of the present, past and future are
A) Not linked to any extent
B) Linked to one another in their cell membrane
C) Linked to one another by the sharing of the common genetic materials but to varying degrees
D) Linked to another by the sharing of the common genetic material to 100% extent

Answer 1

Every living organism on the earth was derived from some other organism, where we called it ancestors, and where there is a chance of formation 2 or more species form from a single ancestor, and this process is called the common descent of living organisms.

Complete answer:
As we know that every organism has some common biological molecules present, they are nothing but genetic material such as DNA and RNA.
Where we know that DNA is the material which replicates during the cell division or the formation of gametes.
During the process of replication, each DNA strand acts as template and forms new complementary strand to those and doubles, but again each new DNA that is formed gets one strand from the parent.
So every time new cells are formed they are linked to previous, so we can say every organism is linked to each other.
But some variations happen due to mutations that occur in some cells and reshuffling of genes and during formation of gametes and meiosis they will be crossing over takes place which also results in variations of the genes. So we can say that organisms are linked to each other but there are some variations.

The correct option is C.

Note: The common biological molecule that is present in all living organisms such as from lower organisms which includes bacteria to higher organisms including plants are DNA, and RNA, where totally 23 proteins are present which code for enzymes are common in almost all organisms.