H2O is a substance that that is classified as a compound. It is the chemical formula of water. A compound is two or more elements that have been chemically combined. In this question, water has two elements which are hydrogen (H) and oxygen (O). Two hydrogen atoms combine with one oxygen atom to form a compound. The answer will thus be B.
Mitosis occurs<span> in the cell nuclei of eukaryotic cells that are not related to reproduction, while meiosis takes place in the cell nuclei of eukaryotic cells that are related to reproduction. During mitosis, a cell divides into two identical daughter cells which are used for the growth and replacement of worn cells.</span>
They could be white or black. Black should be dominant, I guess, so 75% of offspring should be black.
It may cause mutations; Artificial selection is the process of unintentional modification of a species through human actions which encourage the breeding of certain traits over others. Some disadvantages of artificial selection is that it is inhumane, can cause mutations or produce new problems. Hope it helps :D