I think it is A but not 100% sure. Think of an enzyme like a key unlock the lock is the protein. And to activate getting inside your car or house you have to fit the key into the lock.
Answer:
Charles Darwin went to the Galapagos Island(s).
Explanation:
Charles Darwin took a boat to the Galapagos Island(s) to study plants and animals that proved to show some similarity between each other, such as two finches, which is actually one of his most popular discoveries.
I would say zygote ® fetus ® embryo ® blastocyst
Arabian plate and Eurasian plate is the correct answer.