Answer:
541 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago with the end-Permian extinction, the greatest extinction event in Earth history.
source- Britannica
Explanation:
Answer:
Evolution is the gradual change in the inherited traits of a population over several generations. natural selection is a mechanism where the members of a population best suited to their environment have the best chance of surviving to pass their genes
Anxiety, overexcitement, inability to focus, poor coordination, and shaking are common side effects of substance abuse. The class of drugs includes cocaine, nicotine, ecstasy, and amphetamines.However, any drug when used that can cause euphoria or feeling “high” can become a drug of abuse.
MONOMER AND POLYMER ARE YOU ANSWERS EITHER ONE OF THOSE 2
