Multicellular organisms have five levels of organization ranging from simplest to most complex. the simplest level is the cellular level. this is an image of one type of cell found in your body: a cheek cell. you are the most complex level: you are an organism. list the five levels of organization, from simplest to most complex. describe each level with one or two sentences. give an example at each level.

What is the difference between how ionic and covalent bonds form

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?