Ecosystems can change over time because of physical processes or A. grass or forest fires
B. hurricanes or tornadoes
C. very cold winters
D. human activities

Why is excretion necessary to maintain homeostasis?

What is the correct trna sequence that would match the following mrna sequence.gcgaua

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.