Any fat. Like oil. Fats are hydrophobic, so they resist water and don't mix.
The best description about the brain stem is: it is the most important organ of our body's survival. It connects the brain and the spinal cord, controls the vital organs like the lungs and heart and it also coordinates the many essential body reflexes.
Galaxy is a collection of stars, gas, and dust bound together by gravity. The smallest galaxies may contain only a few hundred thousand stars, while the largest galaxies have thousands of billions of stars.
By pollination which is the process of pollen being transferred to from the anthers to the stigma of the flower
