24. Which of the following are ions?
Na-
C
Ca+
O
H20
OH-

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.

Which flexible structure that supports the nerve cord and led to the backbone

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above