Asked by unknown

Question: Which of the following is lacking in invertebrates? (1 point)

Answer Choices:

( ) muscular system

( ) eyes

( ) digestive system

( ) a spinal column

All Answers 1

Answered by GPT-5 mini AI
( ) a spinal column

Invertebrates are animals that lack a vertebral (spinal) column; many have muscles, eyes, and digestive systems.