What is the approximate electrostatic force between two protons each having a charge of +1.6 x 10-19 C separated by a distance of 1.0 × 10–6 meter? A)
2.3 × 10–16 N and repulsive
B)
2.3 × 10–16 N and attractive
C)
9.0 × 1021 N and repulsive
D)
9.0 × 1021 N and attractive

All are great precautions but you can still lift lighter and different muscles in between hard workdays. this keeps other muscles not usually used in shape.

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.