Ecosystems can be changed by natural events or by human actions. Which is NOT a natural event?

A. A forest fire started by lightning

B. pollution from a factory entering a river

C. a beaver building a dam in a river

D. An earthquake

The biological classification of organisms is called taxonomy. Based on your own investigation, discuss the importance of taxonomy in biological?

Where are greenhouse gases?

Which of the following is a function of the cell membrane of a cell? A. The transport of genetic material within the cytoplasm of the cell. B. The production of genetic material through DNA transcription. C.

Many farmers select their cattle for breeding, but some farmers allow natural breeding to occur. The Jersey sire on this farm wasn't selected by the farmer for mating. What's the possible benefit to allowing natural breeding among cattle?

When technological advancement was necessary before scientists could begin to observe cells

The brain operates on two levels, conscious and unconscious. this is called:

What are the differences between renewable resources, non renewable resources and sustainable option?

What is biopsychology?

The atmosphere is one part of the environment that does not directly affect us

Defecation depends on a. distention of the rectal wall b. sensory impulses to the sacral spinal cord c. motor impulses back to the colon d. all of the above must happen for defecation to occur