They begin to form about 3.8 billion years ago
How is controlling wide spread/contagious diseases made difficult by the fact that it spreads through multiple species of animals?
(is it still too complicated?)
Answer:
A living thing's first feature is that it is made up of cells. A cell is the basic structural unit of all organisms. It is the smallest organization structure in a living thing. They contain the organism's genetic information (DNA) and can replicate themselves in a process known as mitosis.
Answer:
D is the right answer.....
It depends on whether or not the parents are heterozygous for the trait. if they both are, then the child will have a 75% chance of having a widows peak.
