1. what are the three main types of signals can cells receive?

The graph shows the solubility of several different salts in water, across a range of temperatures. according to the graph, which salt can dissolve at a concentration of about 60 g/100 cm3 of water at 40 degrees celsius?

Which element is found in both dna and proteins

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?