It wouldn't flourish because there are no more decomposers. With no decomposition there cannot be a food chain because it all depends on that specific part of the link. You see, the plant population would die. Due to the lack of fungus(decomposers)
An open flame or burning flame
It’s water I don’t know but it’s only that
D. The mutation will be expressed only if the individual has two copies of the recessive allele.
Well since cacti are usually found in hot and dry places they wont have much of a supply of water. so the cacti will grow and adapt over time to need less water; therefor, the cactus stem's structure benefits the plant because it has adapted to need less water. get it?