Adenine is a component of ATP and is also found in both DNA and RNA.
Answer:
When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. It can breed and spread quickly, taking over an area. Invasive species can change the food web in an ecosystem by destroying or replacing native food sources.
Explanation:
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All except number 2. Hope this helps!
<span>sperm and egg cells uniting to produce fertilized eggs</span>