Draw a six-carbon-chain portion from isotactic polypropylene, in which all of the CH3CH3 groups point in the same direction, that is, either all behind or all in front of the plane of the computer screen. XX represents the continuation of the polymer chain. Do not add any bonds to X .

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under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.