An example of something that does not have mass would most likely be air. Because in order for something to have mass, it must take up space and have shape. Anything that you can think of that does <u>not</u> have <u>space or shape</u> does not have mass.
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells
Benign means that the growth doesn’t spread to other parts of the body and the tumor is noncancerous.
Changing environments or major historical events.