Answer:
pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic. Since pH can be affected by chemicals in the water, pH is an important indicator of water that is changing chemically.
The Sinoatrial node (SA) - a collection of specialized cells and is located in the holder wall of the right atrium
Answer: No
Explanation: Since when a child is born it has DNA from both. As an example, the mom has brown hair, father has blonde hair, the child would take the DNA for the type of hair they get, either blonde or brown. So since its blood, the fathers is A, and the boy's is B, therefore it didn't take any of their DNA's so nope, he isn't the father.
When an acetate fiber is cut and is seen under a microscope, the cross section is crenulated shaped. Crenulated shaped cross section is a resultant effect when the external part of the cellular solution solidifies first than the interior of the acetate fiber when taken out rapidly out the acid bath.
