They basically are, because its when one egg splits in two. So they pretty much are clones in the deffinition of the word.
The correct answer is a.
Bone remodelling (or bone metabolism) is the term describing the continuous reshaping of the bones, by removing mature bone tissue and forming new bone tissue. Two main types of cells participate in this process, the osteoblasts and osteoclasts. Osteoblasts secrete new bone and osteoclasts break down the mature bone.
In a balanced ecosystem, the number of producers is far greater than the number of consumers.
The answer is A) the mantle
The answer is D.) A region of little or no rainfall that cannot support life