Describe One way that sickle cell disease can cause red blood cells to have a reduced lifespan

Are the earth's ocean floor and continents the same age geologically? why or why not?

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?

How does secondary succession differ from primary succession?