Complete the statement to describe the calcium concentration that must be maintained in human body cells. The calcium concentration must be greater
the cell than the cell.

What are the base pairing rules? how does this allow for dna replication

Answer asap 50 points which of the following distinguishes the soil composition of grassland? 1. the soil supports large trees with thick, long roots, so horizon b needs to be deep enough to sustain larger flora. 2. the soil supports large trees with thick, long roots, so horizon a needs to be deep enough to sustain larger flora. 3. the soil supports small plants and shrubs with short roots, so horizon a needs to be deep enough to sustain smaller flora. 4. the soil supports small plants and shrubs with short roots, so horizon b needs to be deep enough to sustain smaller flora.

What elements together make up seven percent of the earth crust