The diagram shows an energy pyramid. If the flowers contain 50,000 kcal of energy, about how much energy will the lizard obtain from eating the butterfly?

500 kcal
5,000 kcal
50,000 kcal
500,000 kcal

How dose plate tectonics effect climate

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?

Which type of landforms forms at the plate boundary as a result of divergent stress