The definition of symbiosis has varied among scientists. Some advocated that the term symbiosis should only refer to persistent mutualisms, while others thought it should apply to any type of persistent biological interaction (in other words mutualistic, commensalistic, or parasitic).
The League of Nations failed for a couple of reasons: 1  The United States was not part of it. 2  More importantly, the countries in the League did not take the idea of collective security seriously.3  When countries attacked others, nothing was done. 4  For example, Italy attacked Ethiopia and Japan attacked China. The United States was not part of it. 2  More importantly, the countries in the League did not take the idea of collective security seriously. 3  When countries attacked others, nothing was done. 4  For example, Italy attacked Ethiopia and Japan attacked China. 5  In both cases, nothing serious was done.
2. Explain why the League of Nations failed to deal successfully with the Japanese invasion of Manchuria in 1931. This is because the league felt threatened by Japan. This was because Japan had a powerful army and navy and the army leaders dictated government policy.ne of the last failures of the League before it collapsed was the invasion of Japan on Manchuria. The invasion got more serious and eventually ended up in Japan resigning from the League. Japan was also a major country in the League that traded with the USA and had a good income for the league.