How many hours in a day do cats sleep, on average?

Why do cats sleep so much? Cats have evolved to sleep for long periods throughout the day. Wild cats need to sleep in order to conserve their energy to hunt, chase and kill their next meal. Although our house cats may not need to hunt, the instinct to sleep and prepare for the hunt carries on.

Explanation:

Hope it is helpful

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.