What structure is most likely found in both viruses and cells

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.