The answer would be nicotine.
Nicotine is an addictive substance. The type of nicotine that is found particularly in tobacco is nicotiana tabacum. It comes from the nightshade family of plants. Other forms of nicotine can also be found in tomatoes, potatoes, green peppers, and eggplants.
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
B) the decay of once-living things
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Answer:
Answer is whole-gene or whole-genome.
Explanation:
Genetic variation explains that, no matter how related or identical some organisms might be, there is a or some characters that make them different from one another. These difference is referred to as variation.
Furthermore, whole-gene means the coding and non-coding regions of the DNA>
There are some activities or occurrences that cause genetic variation, these are gene flow, mutation and sexual reproduction.
Examples of genetic variation are color of the eyes, modification of leaf and blood type among others.
