Hailey did 10 sets of sprints. When she relaxed afterward, her muscles started to feel sore. Which of the following best explains what was built up in her muscles? O energy from cellular respiration
Olactic acid from anaerobic respiration Oalcohol from fermentation
O carbon dioxide from cellular respiration

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance

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?