A bicycle travels 45 m along a circular track of radius 30 m. What is the angular displacement in radians of the bicycle from its starting position?

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Amicroscope, because these cells are so small that you would not be able to see them, or what they attack without it.

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.

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