Which of the following best describes an ecosystem? a. all the living organisms in an area b. all the living organisms in an area and their physical surroundings c. a region with a distinct climate d. all the living organisms of the same species throughout the world

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

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

2points what do bacteria have in common with the cells of other living organisms?