1<span>) Chronic, intractable respiratory infections</span>
Some membranes involve substances moving down their concentration gradient<span>. ... If the energy of ATP is completely used to put </span>molecules against<span> their </span>concentration gradient, this is known as primary active transport.
Bro plans are not that hard we were on animal reproduction and just moved on to plant
Answer:
villi is used and is very imp as it has structure like finger type which help for increase in surface area for more absorption and less wastage of water/minerals
The repeating stages a cell experiences, including cell division, compose the cell cycle, it is a sequence of events that lead first to the growth of the cell and later to the division into daughter cells. The cell cycle begins at the moment when a new cell appears, descended from another cell that has been divided, and ends at the moment when said cell, by subsequent division, originates new daughter cells.