Choose the four variables that are most important to control in an experiment about the rate at which bread turns moldy.

humidity time of day age of bread type of bread shape of bread height of observer type of shelf surface type of storage container.

Explanation:

Choose the four variables that are most important to control in an experiment about the rate at which bread turns moldy. humidity time of day age of bread type of bread shape of bread height of observer type of shelf surface type of storage container.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

about 40,000,000 results (0.81 seconds)  

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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.