Answer:A
Explanation:earths gravity keeps it in orbit around the earth
What causes alteration of plant debris that make coal?
fine debris emitted as a byproduct of coal combustion. coal, oil, or natural gas. Fossil fuels formed from the remains of ancient plants and animals. device used for heating by burning a fuel, such as wood or coal.
Answer: muscle's insertion
Explanation:
and the end of the muscle attached to a fixed, or stabilized, bone is called the origin. The muscle primarily responsible for a movement is called the prime mover, and muscles that assist in this action are called synergists.
Part A: Water molecules are polar, meaning that they are neutrally charged overall, but with partial positive charges on the H atoms and a partial negative charge on the O atom. Thus, polar molecules like the salt, are like the water, neutrally charged and its ions interact with both the partially positive and partially negative parts of the H2O molecules.
Part B: In a dissolution of salt in water, the solvent is the water and solute is the salt. Solvent is a substance that allows the dispersion of another substance in itself, like the water in this solution. A solute is a substance that can be dissolved, dispersed in a solvent.
Cells specialize (have different functions/organelle counts, etc) when they selectively activate (turn on) certain genes in their copies of DNA in the cell nucleus.