PLEASE HELP ASAP PLEASE PLEASE PLEASE 10. Julie has red hair while Billy has brown hair. Explain how the differences in their chromosomes can account for this difference in appearance

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?

Match the order of the levels of organization in nature with the correct description. example: atoms are fundamental units of matter= level 1levels- 2,3,4,5,6,7,8.now what levels are these? population consists of organismscells consist of moleculesecosystems consist of communities interacting with there environmentmolecules consist of atomsthe biosphere consist of all ecosystems on earthcommunities consists of populationorganisms consist of cells

How do you suppose living conditions differ between the country furthest along in the demographic transition compared to the country earliest in the transition? how would living conditions in these two countries affect both birth and death rates?