Which traits are characteristic of single-celled organisms? choose all answers that are correct. a. cannot carry out their own life processes b. divide in two to reproduce c. able to replicate themselves in a small time frame d. contain organs that them survive

in situ hybridization has been widely used for research applications, including clinical cytogenetics, gene mapping, tumor biology and studies of chromosome evolution.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.