Paramecia that live in freshwater have contractile vacuoles, while those that live in salt water do not. Why do you think this is the case?

As studied this week in the cell cycle, we saw how a cell moves through its life with a plan. as you transition from a student at uma to a valued member of your chosen career field, what will you put into place in your life to manage and to fit the new responsibilities of your career into your current life?

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Dna replication or repair occurs in a cell in all of thw following situations except when