1. Which of the following characteristics is possessed by invertebrates? a) exoskeleton
b) endoskeleton
c) joint appendages
d) cephalization

a) exoskeleton

Explanation:

Well, many invertebrates – and all arthropods – have a protective external casing called an exoskeleton. This literally means ‘outside skeleton’ and its role is to cover the animal’s soft tissues and also provide a rigid structure to which the creature’s muscles can attach.

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consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.