What does it mean when they say water is a polar molecule

Trilobal fibers were found on kidnapping victim. which of the following fibers would most likely to be trilobat? a. cotton b. nylon c. wool d. silk me

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?