Answer:
Simple diffusion is when the particles travel through the cell and facilitated diffusion is when the molecules travel through the cell.
Answer:
d. None of the above
Explanation:
Fitness -
Fitness is to carry out day to day tasks with alertness and vigor , without any of fatigue , along with the energy , to respond to emergencies and to enjoy leisure-time pursuits.
Advantages of Fitness -
- avoid diseases by fitness .
- muscle strength increases .
- stabilizes the balance of the life .
- increases the body alertness and speed .
Answer:

Explanation:
We need to find the energy produced when Sun converts 1.7 kg of mass into energy. Einstein's mass energy relation is given by :

c is speed of light

So, energy produced is
.
The control group outs the one that you don't change. The reason you don't change it is because you use it as a comparison with the other groups.