15 points please help edge 2021

Which adds oxygen to the blood?
coronary circulation
arterial circulation
systemic circulation
pulmonary circulation

Describe at least 2 abiotic and two biotic factors found in the desert biome how do these abiotic factors interact with the biotic factors

What macromolecule is produced during translation? a. carbohydrate b. rna c. dna d. protein

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system