Answer:
For several months, weighing and measuring the pups every week
Explanation:
This is to control variables and keep a measurable set of data that can prove or disprove the theory they had developed, and also to isolate cases that can't be attributed to the experiment they had carried out, like puppies loosing weight due to illnesses, or behavioral factors.
you can get them at gander mountain for like 10.00
Certain genes/cells are activated/turned on (how ever you want to word it)
Answer:
3. As a place for plants and crops to grow
4. As a material to clean and smooth skin
5. As a building material for homes and buildin
