-In the sixth week the Fallopian tube can no longer expand to accommodate the size of the growing embryo. A tubal pregnancy cannot advance to the twelfth, sixteenth, or eighteenth week, because the tube cannot expand to accommodate the growing fetus.
Due to the fact that all the organisms are connected in a chain, the energy flow would be affected and that would result in many organisms being deprived of energy they need and that creates a chain effect.
