1930-1950 hope this helps
Answer:
via hydrogen bonds; there are two between adenine and thymine and three between cytosine and guanine
<span>Coronary arteries supply blood to the heart muscle.</span>
The answer is Charles Darwin. He was the first to theorize evolution from a common ancestor.
Answer: The main cause of the extinctions is the destruction of natural habitats by human activities, such as cutting down forests and converting land into fields for farming. Due to human activities, populations of many species have become small and isolated.
Explanation:
