Question

multiple choice question the two broad groups that animals have been divided into based on the presence or absence of a backbone are vertebrates and invertebrates. deuterostomes and protostomes. autotrophs and heterotrophs. roundworms and flatworms.

Explanation:

• Vertebrates have a backbone (vertebral column), while invertebrates lack one.
• Deuterostomes and protostomes are classified based on embryonic development.
• Autotrophs and heterotrophs are about nutrition (autotrophs make their own food, heterotrophs consume others).
• Roundworms and flatworms are specific types of invertebrates.

Answer:

vertebrates and invertebrates.