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6
Select the correct answer from each drop-down menu.
An element has an atomic mass number of 16 and an atomic number of 7.
The element has __ protons and __neutrons

If many different species live in an ecosystem, this the ecosystem to fill its a. populations b. niches c. producers d. communities

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half