I would say immigration only.
emigration would theoretically reduce the genetic variation as unique individuals leave, but immigration would bring unique traits into circulation in an ecosystem.
I'm not super great at biogy tho so this might not be right... :)
Answer:
francium
Explanation:
The most expensive natural element is francium, but it decays so quickly it can't be collected to be sold.
Atoms are electrically neutral because they have equal numbers of protons positively charged and electrons negatively charged.
They are called the mesenteries. They are also called the mesenterium, they are peritoneal fold attaching to the small intestine to the dorsal body wall.In humans it wraps around the pancreas and the small intestine and extensions down around the colon and the upper portion of the rectum. Their function is to anchor the small intestine to the walls of the abdominal walls.
Answer:
The answer is A- A saturated fat
