Stomata are pores in the leaves of plants that allow gases to enter and exit the cells. During the sunniest part of the day, the leaves are most actively performing photosynthesis.

During this time, which gas do the stomata allow into the leaf cells?

google my dude. if it doesn't show up ask me.

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.

did you fail the test? xd