D it allows all substances to enter & exit the cell.
Answer/Explanation:
Onions are stem modifications of bulbs. Onions grow during a cold weather, but forms bulbs when the weather is warm. Onions can either be grown using seeds or through their bulbs. That is why, the stem modification of onions are bulbs. Tuber is from potatoes, whereas corm is from crocuses and gladioli.
I think it’s leaf okkkkkkkkkkkkkkkkkkkkkk
Genetic. And it allows for more fish to be created and living freely