Answer:
This is so simple. Read your lesson. If you cheat like this you'll never get through the rest of the course.
Explanation:
Planet earth was probaly formed 30,thousand years ago the first life probably evolved 29 thousand years ago
Cell Theory #1Cells are the basic structure and function of a living thingCell Theory #2All organisms (living things) are made out of cellsCell Theory #3<span>only existing cells can make new cells</span>
Go to the Prenatal Testing page for more details. If one parent has sickle cell trait (HbAS) and the other has sickle cell anaemia (HbSS) there is a one in two(50%) chance that any given child will get sickle cell trait and a one in two chance that any given child will get sickle cell anaemia.