Odors that repel, spines, poisonous chemicals, and thorns are all considered a) adaptations that enhance survival b) traits that oppose natural selection c) characteristics associated only with fossils d) only physical appearances

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?