Is due to coriolus force caused by Earth rotation
The best answer to go with is b
Because while you're preagant your have so much presure on it it doesnt have a choice where as weight gain everything grows with it. Think of it this way, if you've ever felt a pregants womans belly its harder than usual. If you touch someones belly that is bigger its more smoshy (I know thats not spelt right)
When a gene is turned off, It no longer provides the directions for making proteins. this means that the proteins needed to fulfill a particular job ( let’s say, tolerate lactose ) aren’t produced.