3. By the end of prophase, select all of the following that has occurred (SB1b) A. The nuclear membrane has broken down
B. Centrioles and spindle fibers have appeared
C. Chromosomes have lined up in the middle of the cell
D. DNA has become more tightly coiled into rod-shaped structures
E. Separated chromatids move to opposite ends of the cell

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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.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.