Answer: cell —> tissue —> organ —> organ system
aka. D
An oyster possesses pearl that are created over time by some sort of process, and are used in fashion items
Hoped I helped :)
Gel is used as a tool or technique to separate or diagonse DNA fragments according to their size,helps in visualization
There are two points, which will help you in gaining your weight:
1) Eat a lot of food ( rich source of Carbs, fats, proteins )
2) Do minimum aerobic exercise (as you need to conserve your calories)
Hope this helps!