A plant cell with a pressure potential (Ψs) of -7.5 bars keeps a constant volume when immersed in an open-beaker solution that has a solute potential (Ψs) of -4 bars. What is the cell's solute potential (Ψs)?

chordata is the answer

that scientist would be robert hooke

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.