determine the gravitational force of attraction between two 3.5 kg bowling balls whose centers are exactly 2.0 meters from each other.

An atom that has fewer electrons that protons is called a positive ion.

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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.