You should follow your Resource Guide and the checklist at the end of each investigations in the latest edition of Investigating Biology: A Resource Guide to prepare your manuscript.
Pechenik, J.A. 2012. A Short Guide to Writing about Biology. 9th Edition. Pearson Longman Publishers:NY. Longman:NY is an excellent source of advice for the construction of your manuscripts.
Draft manuscripts are due at the end of each period. Final manuscripts are due at the end of the 3rd lab period for a particular investigation and must be accompanied by a "Description of Authorship" form.
Manuscripts and reviewers comments will be returned approximately 48 hours before your lab. You should address all the reviewrs' comments carefully in revised manuscripts.