Nitrogen-14 has a mass number of 14 which means that it has a total of 14 protons and neutrons. When you subtract the atomic number of nitrogen from the mass number of 14 you get the number of neutrons (14-7), which gives you 7 neutrons. Now for nitrogen-15, you have a different mass number which means there is a different amount of neutrons (15-7), 8 neutrons. So the difference is the mass numbers and the number of neutrons (the number of protons remains the same however). When there are two versions of the same element, and they have the same number of protons, but different number of neutrons and different mass numbers, they are called isotopes. Hope this helped :)
Antioxidant
Explanation:
Most serum uric acid is freely filtered in kidney glomeruli, and approximately 90% of filtered uric acid is reabsorbed, implying that it has a considerable physiological role [2], [5]. In humans, over half the antioxidant capacity of blood plasma comes from uric acid [5], [6]. Uric acid is a strong reactive oxygen species (ROS) and peroxynitrite scavenger and antioxidant [5], [6], [7], [8]. High levels of uric acid are readily detected in the cytosol of normal human and mammalian cells, especially in the liver [9], vascular endothelial cells, and in human nasal secretions, where it serves as an antioxidant
The answer cannot be b, because that would be volume. It also cannot be c because that would be mass, which leaves the answer to be a, the amount of matter that makes an object.
Answer:
The sperm of the father determines if a baby will be a boy or a girl. So, only half of his sperms will make a boy and half a girl. The sex of the baby will depend on which sperm gets to the egg first.
1) Crossing over, pairing the genetics of a chromosome
2) During meiosis, the division of sex cells, genetic material in the form of chromosomes sorts itself randomly between cells
3) mutations in the cell can be caused, either positive or negative results
