Identify the purpose of each of the following steps in the photosynthesis experiment. Hole-punching the leaves

Adding bicarbonate buffer to the syringe.

Exposing the disks to a vacuum in the
syringe

Adding a plain buffer to the syringe

Nitrofurantoin used during the fifth week of pregnancy places the neonate at risk for which condition?

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Is this mrna or rna need need the answer in a hurry