It is definitely not a primary source: this would be a book itself.
Now, is it a tertiary source? I don't think so: the author of the review should have read the book and should only be referring to this book in the review.
I think it's a secondary source.
1/4. There is a 1/2 chance for each plant to pass on a gene for wrinkled seeds, and both must pass the gene, so we have 1/2*1/2=1/4.
Answer:
When energy is consumed in a process, chemical energy is made available for synthesis of ATP as one atom gives up electrons (becomes oxidized) and another atom accepts electrons (becomes reduced).
<em>Hope it helps. :T</em>
