Answer:
The microscopic structural unit of compact bone is called an osteon, or Haversian system. Each osteon is composed of concentric rings of calcified matrix called lamellae (singular = lamella).
Explanation:
E. One cell contains more mitochondria than the other.
A Poodle and a Labrador retriever can mate and have offspring. This means that these dogs are members of the same species. The correct answer is D.
Lysosomes break down and recycle worn out cells.
1. earthquake measures
2. b
3. seismograph
