Several days of fair weather are probably the result of
A. a warm, dry air mass moving over an area.
B. A huge low pressure system moving over an area.
C. A warm front that has stalled over an area.
D. A cold front that has remained in the area.

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?

The unique structure of the neuron is dedicated to the efficient and rapid transmission of neural signals. the relationship between neurons, the spinal cord, and the brain constitutes an elaborate communication system throughout the human body. all but one of the functions listed below are a result of this interaction.

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above