Reclamation restores an environment affected by mining to a state where it can sustain its ecosystem. select the best answer from the choices provided t f

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Is there any solid scientific evidence that humans have been cloned?

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?