<span>The Hardy – Weinberg principle has seven conditions that should occur in the evolution of the population. One is when mutation does not happen. Two, is when natural selection is not occurring. Three, if the population is infinitely large. Four, if all the members of the population produce offspring. Five, sexual intercourse is random. Six, the population will produce the same number of offspring. And lastly, the population does not migrate from one place into the other. Th thing that would disrupt the genetic equilibrium is the mutation.</span>
Answer:
observation gives you answers. Patterns, motion, matter, time etc
Persian windmill blades were vertical, like propellers, while European ones were horizontal, like egg-beaters.
<u>Explanation:
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A windmill is a functioning engine sort of thing. This transforms energy from the wind into rotational energy. For this reason this requires vanes called sails or blades. The very first windmills featured with long vertical shafts with blades designed like rectangles who lived in ninth-century Persia.
Six to twelve sails were produced of those windmills. The sails had been coated with matting reed or fabric. They differed greatly from the European editions. In 13th century China a similar nature of vertical shaft windmill with rectangular blades was found used for irrigation. Overall around 60 AD vertical axle windmills had been found in eastern Persia. In the 1180s northwestern Europe developed horizontal axle windmills. It is the form that is often employed today.
Fossils tell u if something has been there or not and u study it in some classes or jobs
