Tutor profile: Erika T.
How to you format a reference or works cited section?
It depends on the purpose of your writing. For class papers, most professors will tell you what general format they want you to use. If you are writing a paper for submission to a journal you will need to format it according to their specifications (specifications are always given on the journal's site - although they can vary quite a lot). Whatever format needed it is incredibly important to include your reference material and cited works. And always, ALWAYS, use primary literature.
What is a parasitoid? How is it different from a parasite?
Parasitoids and parasites are organisms that require a host organism to complete their life cycle. Parasitoids are typically free living and lay their eggs on or in a host. These eggs then hatch and consume the live host eventually killing it (exceptions to this include parasitoids that have plants for hosts - plant hosts are rarely killed unless overloaded with too many parasitoids). Wasps and flies are common examples of parasitoids. Parasites on the other hand typically feed on the host organism without actually killing it even though some may never leave the host. Common example of parasites are fleas, ticks, mites, and mosquitos.
How do you change part or all of the background of a photo without actually losing or overwriting the original background?
Create masking layers! You can create multiple different backgrounds which can completely "replace" or incorporating parts of the original background in your image. This can be done while not damaging the original background - so you can return to it with just a click or two if you want.
needs and Erika will reply soon.