Which best describes Archaebacteria, such as methanogens?

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

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?

24. how are vaccines used to keep people healthy?