7. The cell theory was
a. first identified in 1665
b. the end result of many scientific investigations
c. described by Rudolf Virchow
d. Both (a) and (b)

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?