Which action is prevented by the cell membrane?

What does resonance result in? quieter sounds frequency amplitude louder sounds

Using the periodic table, determine which material is most likely a good conductor

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.