<span>Sternum is not a major muscle in the human body. Sternum is t</span>he long flat bone in the upper middle of the front of the chest. It is also called a Breastbone. Sternum <span>the </span>sternum<span> helps protect the internal thoracic viscera - such as the heart, lungs and oesophagus</span>
Answer:
D. Changing land use and burning fossil fuels.
Explanation:
Today, the carbon cycle is changing. Humans are moving more carbon into the atmosphere from other parts of the Earth system. More carbon is moving to the atmosphere when fossil fuels, like coal and oil, are burned. More carbon is moving to the atmosphere as humans get rid of forests by burning the trees.
Answer:
i think its the first one
Explanation:
if I remember correctly I'm pretty sure all cells have a nucleus
Answer:
It is important for the cell to be able to bring necessary nutrients immedriately where it needs to and to be able to dispose of harmful byproducts of the cell process. It is equally important to be able to regulate water concentration.
