Early systems for classifying plants were based on characteristics people could see easily because blank

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?

What is a group of organisms that are closely related and share similar characteristics

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell