Answer: A, through extensive testing and the accumulation of several lines of evidence
Explanation:
<span>A mutagen is a physical or synthetic operator that progressions the hereditary material, normally DNA, of a creature and along these lines expands the recurrence of transformations over the regular foundation level. Mutagens can be physical or chemical that should increase the mutation rate.</span><span />
The haploid male (sperm) and female (egg<span>) sex </span>cells<span>; in </span>plants<span>, formed by mitosis of haploid </span>cells<span> in the gametophyte. ... The multicellular diploid portion of the </span>plant life cycle<span> resulting from the growth, mitosis, and </span>cell<span> division of a zygote. </span>Produces<span>sporangium that store haploid spores. Google*</span>
