[Solved] A 200-cm open organ with one end open pipe is in resonance with a sound wave of wavelength 270 cm. The pipe is operating in its: A) fundamental frequency B) first overtone C) second overtone D) third overtone E) fourth overtone Reproductive Skew: A concept in biology that describes the unequal distribution of reproductive opportunities among individuals within a group or population. Direct Fitness: The genetic contribution an individual makes to the next generation through its own offspring. Polyandry: A mating system where a female has multiple male partners over a breeding season, uncommon among mammals but observed in some species. Eusocial Group: A hierarchical social structure seen in certain animals, like naked mole rats and bees, characterized by cooperative care of offspring and division of labor.