The dependent variable is how much weight the athletes gained.
In human populations, ethnic hatred and civil war can cause two populations to become reproductively isolated as happened in Rwanda where the Tutsi and Huttus blamed each other for the problems of their nation and with the result of no friendly relation between the two and a resulting genocide.
The answer is :
B. A eukaryotic cell's nucleus contains the DNA or the genetic material of the cell.
The DNA has the necessary information for the cell's construction and the control of the synthesis tasks done by the cell. The nucleus is protected by the nuclear membrane. It surrounds the nucleus with a membrane with many pores.
Explanation:
The nucleus is a membrane-enclosed organelle located in most eukaryotic cells. The nucleus is the largest organelle in the cell and includes most of the cell's genetic information (mitochondria also contain DNA, called mitochondrial DNA, but it proceeds up just a small portion of the cell's overall DNA content. Inside its fully enclosed nuclear membrane, it contains the preponderance of the cell's hereditary material. This material is designed as DNA molecules, along with a family of proteins, to form chromosomes.
It is during anaphase I of miosis that the sister chromatic are separated and pulled to the opposite sides of the cell
