Which of the following chemical equations is balanced? a. h2 + cl2 4hcl b. 4h2 + 2o2 2h2o c. 4fe + 3o2 2fe2o3 d. 2fe + hcl fecl2 + h2

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

Anurse is caring for a client who is learning how to take care of a newly created colostomy. when observing a return demonstration of the colostomy irrigation, the nurse evaluates that more teaching is required when the client carries out what procedure?