Answer:
The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.Aug 14, 2020.
Answer: Single cell organisms dont need a respiratory system because oxygen and carbon-dioxe diffuses between their body tissues and the enviorment.
Answer:
Population density and transportation, Switzerland (technically), Africa
Explanation:
population density means of the population is close together and as such it can spread easier. Modern transportation I.E. buses, planes, railroads can transport large numbers of infected people to several different places within a nation and lead to more cases Switzerland is the highest per capita it has 1340 confirm cases per 1 million people however that's likely because they are able to test a large amount of the population at once whereas a larger Nations such as the u.s. or China is unable to test all their population at once and get accurate results. Africa is least affected due to not having a lot of population some together with the exception of some major cities and more industrialized countries such as Egypt and also Lacking the modern transportation systems available in more industrialized nations they don't have as many trains they don't really have too many planes able to transport infected people everywhere
Phagocytes are cells that protect the body by ingesting (phagocytosing) harmful foreign particles, bacteria, and dead or dying cells
