____________________ is a discharge of electricity, a giant spark, which usually occurs in mature thunderstorms.

The relationship between the dung beetles and the cattle is a type of

A) mutualism. B) parasitism. C) intraspecific competition. D) interspecific competition.

Which fuel is not considered biomass?

A. wood B. crop residues C. charcoal D. animal manure E. coal

Explain the reactions that occur in a nuclear power plant

What will be an ideal response?

On the average, the "friction layer" extends to approximately ________ meters above the ground

A) 1 B) 10 C) 100 D) 1,000 E) 10,000