Need Help for upcoming exam ! Please hurry!  1

Need Help for upcoming exam ! Please hurry! 

1. In a paragraph describe the early developments of animals, using and defining all the following terms: fertilization, zygote, cleavage. blastula, gastrulation, cell differentiation, organogenesis, and morphogenesis. 

2. In a paragraph explain the difference between "secondary loss" and independent evolution of traits. Give at least one example of each within Kingdom Animalia including evidence supporting they hypothesis that the trait has been lost or evolved independently. 

3. Monotremes including the cuck-billed platypus and the spiny echidna, both of which are mammals, but lay eggs. In a paragraph explain why these are considered mammals and give a possible explanation why they are not more egg-laying mammals.