For one, if they show really skinny models, it can make other people feel bad about themselves and they could be depressed, two, if they used "heavier" models, people would feel better knowing that they are skinnier that some models and it would give them positive outlook on life.
When a sperm and an egg are combined they create a zygote.
I am not sure what you mean but I will assume you are asking what is a good schedule to sleep and wake up. In my opinion I think that going to bed around 9:30 and waking up around 7:30. This is because not only well you have more than 10 hours to sleep you will also be more energized and that means you can have a early start to your day. Studies have shown that sleeping early and walking up early not only helps the brain but also it gives you a more productive day. Hope that helped:))
Deppresion
hyoxia
sudden infant death sydrome