Liver tissue is a combination of many types of cells. in addition to other tissues, it contains connective tissue and epithelial tissue. which two sentences correctly identify the roles of these tissues?
a)connective tissue supports the framework of the liver, and epithelial tissue protects the liver.
b)connective tissue to send impulses to the brain, and epithelial tissue in contraction and relaxation.
c)connective tissue with contraction and relaxation, and epithelial tissue supports the framework of the liver.
d)connective tissue forms the lining of the liver, and epithelial tissue to send impulses to the brain.
e)connective tissue holds the liver in place during movement, and epithelial tissue forms the lining of the liver.

the correct answer is E) connective tissue holds the liver in place during movement, and epithelial tissue forms the lining of the liver.

the answer is both a and e

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the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.