A certain sand-dune landscape is composed of two habitat types: semistabilized (SM) sand habitat and stabilized (ST) sand habitat. A researcher has observed that Gerbillus pyramidum (GP) mainly occurs in the SM habitat and G. allenbyi (GA) mainly occurs in the ST habitat. Axis of environmental heterogeneity is

a. Heterogeneity in food types
b. Heterogeneity in habitat types
c. Heterogeneity in environmental conditions in different parts of the night
d. Heterogeneity in disturbance regime
e. None of the above

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.