Lesson 4 Invertebrate Evolution and Diversity 1 I need help with this lesson if anyone could help me today.

Which is it a characteristic of the animal kingdom? a. they include both vertebrates and invertebrates b. their skin is covered with hair or fur c. they are heterotrophs d. they are eukaryotic

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Organisms that successfully adapt will leave to grownone of the above