What type of waves will be primarily seen during the deepest non-rem stages of sleep?

7th grade question (easy) look at the diagram of the food web. the arrows mean eaten by. what would happen if the number of snakes went down? answer choices are in the image.

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Explain how organisms could be harmed by high levels of salt from roadways?