Answer:
Add them!
Explanation:
The mass number of an atom is its total number of protons and neutrons
Because the energy is going to decrease to also nothing and the animals at the top have to hunt more than those closer to the bottom of the food web
The function of the respiratory system is to exchange two gases: oxygen and carbon dioxide.
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Answer:
The rate of fermentation can be measured by placing a small amount of yeast and sugar solution in a fermentation tube. ... The fermentation rate of the yeast can be calculated by measuring the volume of CO2 at the top of the tube and dividing it by the amount of time it took for that volume to form
