The head section of the mammalian skeleton consists of the brain section, which is divided into the frontal, parietal, temporal, occipital bones. Facial section: upper and lower jaws,
Maple and birch store starch before winter. In the spring, starch is needed to nourish the kidneys. In the trunk of a tree, starch is converted into sugar.
1) removal of end products of dissimilation, removal of excess salt, water and toxic substances. 2) regulation of blood pressure 3) dopamine production
Birch sap – nutrients of birch. She gets them in two ways: 1 – reproduces herself using photosynthesis. 2 – extracts water nutrients from the ground. If we
When 20 grams of calcium reacted with an excess of hydrochloric acid, 140 liters of hydrogen were released under normal conditions, calculate the volume fraction of the reaction