Answer:
A
Explanation:
A is adaptations, not natural selection
Answer:
weenie dog but the scientific name for it is a Dotson
Adenine and guanine have a fused-ring skeletal structure derived of purine, hence they are called purine bases. ... Similarly, the simple-ring structure of cytosine, uracil, and thymine is derived of pyrimidine, so those three bases are called the pyrimidine bases.
Enzymes<span> are protein catalysts that speed biochemical </span>reactions<span> by facilitating the molecular rearrangements that support cell function.
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Tectonic plate movements, volcanic eruptions, earthquakes, and climate change have shifted wildlife habitats, wiped out large numbers of species, and created opportunities for the evolution of new species. Hope this helped!