How does mutualism compare with commensalism? In both mutualism and commensalism, all organisms engage in active competition with each other, often at the other's expense.
In both mutualism and commensalism, there are benefits to one organism whereas the other organism may or may not benefit.
In mutualism, both organisms benefit, whereas commensalism benefits one organism without benefiting or harming the other.
In mutualism, one organism is unharmed while the other is harmed, whereas both organisms are harmed in commensalism.

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.