In the late 1950's - 1960's survival from cancer was poor. Damaging surgery and relatively unsophisticated radiotheraphy were the main treatments. Understanding of cancer treatment has transformed over 60 years. The arrival of chemotheraphy, and solid evidence for the link between cancer and factors such as smoking or viruses.
Answer:
It's B The particles that make up nitrogen gas are moving more rapidly
I hope its right if not so please sorry :)
Answer:
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Explanation:
Based on this information, it can be said that evolution of the frog's body is taking place through natural selection. This selection is based on how "fit" the frog is to his environment.
