<span>The significance of chitin in arthropods is Chitin is a structural carbohydrate that forms their exoskeleton. </span>
Answer: True
Explanation:
It should be noted that nutrition, exercise, and genetics contribute to the optimal personal health of an individual.
Good nutrition has a positive effect on the health of individuals. Exercise is also good for ones body. Some environments can being about an increase in the risk of developing certain diseases as well as ones genetics as some diseases are hereditary.
Antibiotics germs killed immune system in the human body
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D) Turtles were the first group of animals to branch off in this tree of animals.
Turtles were the first group of animals to branch off in this tree of animals. According to the tree, the animals share a common ancestor. The first branch shows that what we call a speciation event occurred, resulting in two lineages. The first group of animals to result were the turtles. All the other animals are on the other branch. This does not indicate that any group is more highly evolved than the other.
