Which of the answer choices is a true statement? select all that apply. nonmetals usually exist as molecules, combining with atoms of themselves. nonmetals can exist on their own as individual atoms. metallic elements usually exist as molecules, combining with atoms of themselves. metallic elements can exist on their own as individual atoms.

Answer///(d) atoms contain small,negatively charged particles;

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.