Which of the following is a pattern of biogeography that supports the theory of evolution? a. closely related organisms that live in different environments are often very different from each other. b. analogous structures show common descent for unrelated species. c. closely related organisms that live in different environments don't show any different adaptations. d. analogous structures show that living in similar habitats doesn't lead to similar adaptations.

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.