All plants have a 2 part life cycle that includes a haploid phase and a diploid phase. we call this life cycle question 2 options:

The answer is; alternation of generation.

The haploid phase is represented by the gametophyte while the diploid phase is represented by the sporophyte. Lower plants (such as liverworts and mosses) have a dominant haploid phase while higher plants (such as angiosperms and gymnosperms) have a dominant diploid phase.

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a

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.