In this biosphere cycles can be very complex and interdependent. no cycle happens in isolation. true or false

True

Explanation:

The cycles in all of the spheres of the Earth are interdependent and very complex, and the biosphere is not an exception. The cycles that take part in the biosphere also take part in the other spheres. The influences of all spheres is equally important for the natural cycles to be performed, and if only one of them is lacking, then the cycle will not be able to continue, causing a lot of changes all over the planet because of it.

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.