It is b . Because three of them are less than 90.
Molecules of most elements are made up of only one of an atom of that element.Oxygen,nitrogen hydrogen and chlorine are made of two atoms
Ethics in research facilitates accountability of researchers and their research to the public especially in their responsibility to uphold societal values and morals. Ethics also create foundation for collaborative work between researchers by enhancing trust, respect and fairness in the field
Nucleus, mitochondria, vacuole, cytoplasm,
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