Q.

Unicellular organisms are immortal because:

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a

they secrete some chemicals that prevent its senescence.

b

no acid, alkali, enzymes, or high temperature can destroy unicellular organisms.

c

they are the most resistant organisms on earth.

d

parental body is distributed among the offspring by cell division.

answer is D.

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Detailed Solution

No individual organism is immortal except single celled organisms because parental body is distributed among the offspring by cell division.

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