Answer: A mutagen is a chemical compound or form of radiation that causes mutations, which of course means a change in the dna of a cell. So, your answer would be C) an environmental agent that changes DNA.
Answer:
A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest
Explanation:
It is always done on purpose.
<span>The lysosomes are membrane-enclosed organelle, usually spherical. They contain a number of hydrolytic enzymes that are able to break down dfferent kind of molecules. However, to maintain the optimal conditions for enzymes to perform their function, pH in the lysosomes must bi acidic and thus maintained between 4.5 and 5.0. Apart from hydrolytic enzymes, the lysosomes contain substances involved in cell signaling and energy metabolism. </span>