Question

Choose the combination of organisms having lifespan of more than 20 years.
A) Elephant, Parrot, Dog, Crocodile
B) Rose, Crow, Banyan tree
C) Crow, Banyan tree, Crocodile
D) Elephant, Parrot, Dog, Banyan tree, Crocodile

Answer 1

Hint: Small animals like birds and squirrels rarely survive to their maximum life span, basically dying of accidents, disease, or predation. Maximum lifetime is typically longer for species that are larger or have effective protection against predation, like bird flight, chemical defenses, or living in social groups.

Complete answer:
Life span: the time period from birth to the natural death of an organism. Life span can never correspond with the size of animals. The life span of some animals are given below-
Elephant - 60-90 years
Parrot - 100 - 140 years
Dog - 20 - 30 years
Rose - 5 - 7 years
Crow - 15 years
Banyan tree - 200 years
Crocodile - 60 years
"Maximum life span" here means the mean life span of the foremost long-lived 10 percent of a given cohort. Caloric restriction has not yet been shown to interrupt mammalian world records for longevity. Rats, mice, and hamsters undergo maximum life-span extension from a diet that includes every of the nutrients but only 40–60 percent of the calories that the animals consume once they can eat the maximum amount as they need. The mean life span is raised 65 percent and the maximum life span is increased 50 percent when caloric restriction is started just before puberty. For fruit flies, the life-extending benefits of calorie restriction are gained instantly at any age upon starting calorie restriction and ended immediately at any age upon resuming full feeding.

So the correct answer is option D) Elephant, Parrot, Dog, Banyan tree, Crocodile.

Note:
-Some jellyfish species, including Turritopsis dohrnii, Laodicea undulata, and Aurelia sp.1, are ready to revert to the polyp stage even after reproducing (so-called reversible life cycle), instead of dying as in other jellyfish. Consequently, these species are considered biologically immortal and haven't any maximum lifespan.
-There could also be no natural restriction to the Hydra's life span, but it's not yet clear how to calculate the age of a specimen.
-Flatworms, or Platyhelminthes, are known to be "almost immortal" as they need an excellent regeneration capacity, continuous growth, and binary fission type cell division.