Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
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Question: Question: When did new plants start sprouting after the forest fire? Answer: two months later

Answer: Secondary Succession. Two months after a forest fire, new plants are already sprouting among the charred logs.

Question: Question: Fertilization is the union of a sperm and egg, resulting in the formation of what? Answer: a zygote

Answer: Fertilization is the union of a sperm and egg, resulting in the formation of a zygote.

Question: Question: What is an insect's hard outer exoskeleton made out of? Answer: chitin

Answer:
Figure 3.11 Insects have a hard outer exoskeleton made of chitin, a type of polysaccharide. (credit: Louise Docker).