The average menstrual cycle is about days long; ovulation occurs on about day

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

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.

Ascientific idea becomes valid when it is what?