Answer:
Deuterium
Explanation:
Deuterium is an isotope of hydrogen with one proton and one neutron in its nucleus.
Thus it has a mass number 2.
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Answer: usually from carbs
Explanation:
We should note that the function of the ATP molecule is simply for the storage of energy. In a case whereby the ATP molecule loses a phosphate group, energy is being released from it which is used for cellular processes.
Our body get the energy for reattaching a third phosphate to ADP, creating ATP usually from carbs. Therefore, the correct option is B.
Implantation - About a week after the sperm has fertilized the egg, the fertilized egg has traveled to the uterus and has become a growing cluster of about 100 cells called a blastocyst. The blastocyst then attaches itself to the lining of the uterus (the endometrium). This attachment process is called implantation.
Ovulation - Ovulation is a phase in the menstrual cycle. It occurs at about day 14 of a 28-day menstrual cycle. Specifically, ovulation is the release of the egg (ovum) from a woman's ovary.