C is the correct answer.
Platelets -> Clotting Factors -> Fibrinogen - > Fibrin
An atomic number of an element tells you the number of protons in every atom of that element. The number of protons is generally the same as the number of electrons too.
The mass number is the number of protons and neutrons combined.
Are you referring to vocal cords?
A scientist who studies the interactions or interrelationships between organisms and their physical environment is an Ecologist.
