Explain why it is important to only change one variable in an experiment and keep everything else constant

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?