SORU: aşağıdaki parçaya göre cevaplayınız
According to the passage, just appearing aged without actually being so ----.
Following the growth of biological knowledge in the past
few decades, a few researchers now believe extension
of the human lifespan might be within reach. Why do
organisms - people included - age in the first place?
Like machines, people wear out. However, a machine
can usually be repaired. A good mechanic with a stock
of spare parts can keep it going indefinitely, to the point
where no part of the original remains. The question
arises, of course, of whether the machine is worth
repairing. It is here that people and nature disagree.
From the individual's point of view, survival is a must.
You cannot reproduce unless you are alive. Since
ageing is a sure way of dying, it is no surprise that
people want to stop it from advancing. Moreover, even
the appearance of ageing can be harmful. It reduces the
range of potential partners who find you attractive -
since it is a sign that you are not going to be around for a
very long time to help bring up the baby - and this, in
turn, restricts your ability to reproduce. There is a
paradox, however: the individual's evolved desire not to
age is opposed by another evolutionary force, the
disposable soma. The soma is all of a body's cells apart
from the sex cells. Its role is to get the sex cells, and
thus the organism's genes, into the next generation. But
evolutionary logic seems to require the soma to age and
die in order for a species to continue. There is thus a
premium on reproducing early rather than conserving
resources for a future that may never come.