What are the parts or process that can describe an ecosystem?
a. chemical changes and flow of energy
b. chemical changes and flow of water
c. physical changes and flow of energy
d. physical changes and flow of water

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

What is a dendrite and what does it do?

[34 points awarded to the best answer, use facts and/or data] 1.) what's the likelihood of thunderstorms occurring in the state of maryland? {this question is for a project for science, use facts and/or data and explain why . 34 points to the best answer]