The biome with the most diverse communities of organisms is the rainforest.
I think the correct answer would be A. The yolk sac becomes the placenta. It is membranous sac that is attached to the embryo. It provides all the nutrition and the blood cells needed by the embryo. It is also called the umbilical vesicle.
The one who doesn’t smoke has a very low chance of getting lung cancer as the one who does make has a good change of getting lung cancer. Which makes there health different which also makes there also makes there Likelihood of getting lung cancer differ.
