In the sickle cell activity, what happened to the allele frequencies (the percentage of surviving alleles that were HbA and the percentage of surviving alleles that were HbS) over the course of the experiment? Why did this happen?

Which process is involved in growing crops? irrigation transportation recreation condensation

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

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.