<span>They let a couple know if the developing fetus will have a genetic disease or disorder.</span>
Answer:
It will decrease their ability to exchange air into and out of the lungs, decreasing gas exchange.
Explanation:
Muscular dystrophy is a rare genetic disease of the skeletal system which occurs early in childhood. Other symptom of muscular dystrophy include impaired learning,muscle stiffness and pain. The rib cage protects and houses the lungs. When the muscle of the rib cages gets impaired then it affects how gases are inhaled and exhaled.
Answer:
4.54 billon years
Explanation:
the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years
