Carla is reading an article about a certain species of bacteria that can grow on the leaves of common house plants. the article explains that the bacteria are heterotrophic. which is best supported by the information in the article? the bacteria are probably eubacteria because they live on common plant leaves. the bacteria could be either eubacteria or archaebacteria because both types are always heterotrophic. the bacteria must be eubacteria because they are heterotrophic. the bacteria could be either eubacteria or archaebacteria because both types can live on plant leaves.

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

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?