If there were no decomposers, which of the following would most likely happen
a. some plants might die due to a shortage of important nutrients
b. plants and animals would remain living for a longer period of time
c. animals would start carrying out photosynthesis
d. the amount of dead plant and animal matter would decrease

The tubes transporting minerals and water upward are called ?

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles

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?