Reviewing mass
which statements accurately describe mass? check all that apply.
mass is a chemical property of an object.
mass is measured using a balance.
the mass of an object remains constant.
mass is the same as weight.
kilograms are units of mass.

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.