Answer:
They affect chemical reactions by lowering the activation energy, thus speeding up the reactions.
The electron transport chain<span> occurs across the inner membrane of the </span>mitochondria<span>.
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The tapeworm grows and reproduces in the digestive tract.
Answer:
Increased fitness of large-beaked birds, leading to natural selection
(Why: Birds with larger beaks are better able to survive in the new enviornment)
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Answer:
There is alternate splicing of the runner mRNA.
