<span>The hydrologic, rock, and tectonic cycles are all interconnected. In the rock cycle, water moves regolith during erosion, and the tectonic cycle resurfaces rock through uplifting.The hydrologic, rock, and tectonic cycles are powered by the sun and by the Earth’s interior, the core.</span>
The control center and director of cell activities is the nucleus. The nucleus, which holds all of the DNA, is found at the center of the cell.
Mitochondria: totally real cell organelles that convert sugars, fats and oxygen into usable energy for cells. Midi-chlorians: completely made-up and widely derided microscopic life-forms that give Jedi warriors their ability to use the Force in the "Star Wars" movies.
When a Stickleback fish feels threatened, it will flare out its pair of pelvic spines and three dorsal spines, making it difficult for predators to swallow them.
