Answer:7
Explanation:subtract the number of protons to get 14-7=7
The rays have to travel a larger part of the atmosphere because they are very close to the horizon. So light other than red is scattered away.
Secondary Closure or Second intention
Answer: Dialysis cleans your blood by passing it through a filter. If you do peritoneal dialysis (PD), the filter is the lining of your abdomen (your peritoneum). If you do hemodialysis, the filter is made of plastic. Your blood is on one side of the filter.
Explanation:Hemodialysis uses a machine to pull blood out of the body, filter it, and pump the clean blood back into the body again. The actual filtering happens in a part of the machine called a dialyzer, or artificial kidney. The dialyzer has two parts. One part is for blood.
11. c. crossing-over. Notice how one of the bottom arms of each of the gray and white chromosome overlaps with each other, then their genes switch to the other's arm. That's called crossing over, when homologous chromosomes' genes flip-flop with each other.
14. b. meiosis. Gametes are special daughter cells that are either sperm or egg for sexual reproduction. Since genes are shuffled and daughter cells are not like parent cells, this is meiosis. 1 parent --> 4 non-identical gametes.
16. a. centromeres. During late prophase and all of metaphase of mitosis, identical sister chromatids are fused together at the center of the chromosome "X" by what's called a centromere. Then, during anaphase, the sisters are pulled apart, at these centromeres, by spindles attached to centrioles toward opposite sides of the cell.
17. c. Metaphase only. Although late prophase has this appearance of chromosomes, the best answer is probably only metaphase. It's not in anaphase because that's when sister chromatids are pulled apart at their centromeres.