The human body can make most types of fats it needs from other fats or raw materials. That isn't the case for omega-3 fatty acids. These are essential fats the body can't make from scratch but must be gotten from food.
It has a job similar to a police officer who allows select people to enter and leave a crime scene.
A.
Due to the star not being very massive, when it finally collapses in on itself, it will produce a neutron star, not a black hole.
Answer:
The atomic model is our understanding of how the atom is structured. At one point in history, people believed that any substance was simply made of that substance and would retain that property no matter how small a quantity it was reduced to. Later, some argued that all matter was made of tiny particles called atoms. While this is correct, later researchers found that even the atoms were made of smaller particles called electron, protons, and neutrons. More recently, scientists have discovered quarks, tiny particles that makeup protons and neutrons.
The cell needs transcription because the DNA cannot leave the nucleus and therefore cannot transmit info to the other cells.
