The Texture And Look Of A Microscopic Object
<span>A trait that improves the fitness of its bearer, compared with individuals without the trait.</span>
Answer:
Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects
<span>a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
D is correct!</span>
