"Adolescents is marked with various social changes. explain.

Adolescence is marked by changes across physical, social, emotional and behavior domains as youths transition from childhood to adulthood. During this phase of intense identity formation, adolescents are making more independent decisions and experimenting with new behaviors and experiences.

Explanation:

I majored in psychology.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

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.