Method of obtaining sand and gravel

Aplant has an egg with 34 chromosomes how many chromosomes does a leaf cell of that plant have

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

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.