75% species go extinct to be considered a mass extinction
Answer: B. Low pressure
Explanation: Low-pressure areas are places where the atmosphere is relatively thin. Winds blow inward towards these areas. This causes air to rise, producing clouds and condensation. Low-pressure areas tend to be well-organized storms.
<span>Professor Kwang Jeon observed that some amoebas in his invaded amoeba colonies survived thanks to changes made by the invading bacterias. This comfirmed the endosymbiotic theory that organells are formerly invading free living prokaryotes forms that were integrated and swallowed by others to form a new living unit.</span>
