Can someone jot down some notes about what Ecological Issues are?

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

Beth’s hygrometer is reading a temperature of 30 c and a relative humidity of 65%. the humidity in the air is?

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?