Why did it take 100 years for people to make the connection between the discovery of cells and their involvement in life?

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.

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement