Which of the following factors determines how harmful an introduced chemical will be on the environment? a. type of chemical b. concentration c. weather conditions d. all of the above select the best answer from the choices provided.

Option (D)

Explanation:

Chemicals are usually defined as those substances that are comprised of matters and have a certain chemical composition. Almost all living and non-living things are made up of chemicals. They are very extensively used in all the products. These chemicals are both helpful as well as harmful to different life forms.

These chemicals can be harmful to an environment if the chemical is comprised of toxic elements and in greater amount. For example, acids are comprised of harmful chemicals that can cause damages in an environment. If the weather condition in an area is very drastic then these chemicals can mix up with the water and thereby causes a lot of damages.

Thus, the correct answer is option (D).

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explanation:

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the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.