Answer:
As we have just seen, cells require a constant supply of energy to generate and maintain the biological order that keeps them alive. This energy is derived from the chemical bond energy in food molecules, which thereby serve as fuel for cells.
Explanation:
Answer:
7 followed by 27 zeros
Explanation:
The body of an adult man weighing 70 kg is made up of approximately 6.7 • 10 ^ 27 atoms.
The body of an adult male contains approximately 57% water, but if we look by weight, hydrogen is only 11%, while if we look at the mutual ratio of atoms in water, there are a total of 67% hydrogen atoms.
In this way, most of the weight (mass) of the human body comes from oxygen, but most of the atoms in the body are hydrogen.
The moon has less gravity because it is smaller than the Earth.
Explanation:
under what circumstance does a negative cell presents An antigen to another negative cell
<span>The supply of energy-rich molecules in muscles are used up, then the muscles become tired, and they need to rest.
Lactic acid is being produced from anaerobic respiration. If compared to cellular respiration, fermentation does not produce much energy.</span>
