Question

Lifespan of which one of the following is not more than from a few hours to a few days?
A. Bacteria
B. Mayfly
C. Cicada
D. Yeast

Answer 1

The interval from an organism's birth to its natural death is known as its life span. It can be as short as a few days or as long as several years. The length of their lives isn't always proportional to their size. Crows and parrots, for example, are similar in size, but their life spans are vastly different. A mango tree, for example, has a significantly shorter lifespan than a peepal tree. No matter how long an organism lives, it must eventually die.

Complete explanation:
Option A: Bacteria divide at a rate of once every $12$ minutes to once every $24$ hours. A bacterium's average lifespan is approximately $12$ hours.
So, option A is incorrect.
Option B: Adult mayflies have a limited lifespan. A mayfly's lifespan varies depending on the species, from a few hours to one or even two days.
So, option B is correct.
Option C: Cicada is an insect with one of the world's longest life spans. Cicadas live for roughly $2$ to $5$ years on average; however, some species can live for up to $17$ years.
So, option C is incorrect.
Option D: A yeast's lifespan is roughly $2$ to $3$ weeks. Yeast cells may double their number every $100$ minutes under ideal conditions. About $26$ cell divisions is the average replicative lifetime.
So, option d is incorrect.

Therefore, Option B is the correct answer.

Note:
Maximum life span (or, in the case of humans, maximum reported age at death) is a measure of how long one or more individuals of a population have been seen to live between birth and death. The word can also refer to an estimate of the maximum amount of time a member of a certain species could live between birth and death, assuming optimal conditions for that member's longevity. The term "maximum life span" contrasts with the terms "average life span" and "longevity".