According to Lewis Dot Structures, nonmetals will bond when a(n).
joins with a(n)

Pair of electrons; pair of electrons

Electron shell; valence electron

Unpaired electron; electron shell

Unpaired electron; unpaired electron

Twind is considered to be an abiotic factor because it.?

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin