Please help Which of the following is found on the outside of skeletal muscles? Sarcomere Sheath Bundles Myofibrils

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.

In what ways does the study of human population differ from the study of wildlife ecology