Well there isnt any graph soo...we cant help you.
The sled with a rough metal bottom would take more force to move over ice, because the rough surface would increase friction and the force needed.
The answer is b. The second letter (if there is one) is always written as lowercase
<span>Red blood cells normally have a biconcave shape (picture a donut, but instead of a hole through the centre there's just a downward slope to the centre of the cell). If the cell takes on water, it will increase in size and the sloped areas will start to flatten out. If the cell loses water, it will begin to shrivel. Use these observations and your understanding of osmosis to answer the question!</span>
