The original source of energy in most ecosystems is

When analyzing tree rings, what do scientists assume a thin ring indicates?

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.