Why isn’t a galaxy’s size alone useful in determining its distance from earth?

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?

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Hey everybody i need with a biology question. all the gametes of isogamous organisms are genetically identical. true false