Which of the following characterizes dna: a. non. coding sequences that get deleted in the course of evolution b. coding sequences that regulate gene expression c. non-coding sequences that are expressed in different cell types

The correct answer will be option-B.

Explanation:

DNA is a molecule which acts as the genetic material of the cell. A living cell passes this genetic material to the daughter cell as it stores the information required by the cell.

The long DNA strand contains both coding and non-coding sequence in its length.  Since the coding sequence of a DNA is known as "gene" which codes for a trait of an organism as well as it controls the expression of other genes to express a particular trait.

Thus, Option-B is the correct answer.

c

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.