31 pairs
Spinal nerve, in vertebrates, any one of many paired peripheral nerves that arise from the spinal cord. In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body.
Answer:
B is the right option: I. and III.
Explanation:
In the Fugate family, four children out of seven had a blue complexion. This means that four children expressing such genes that cause blue complexion. These traits are not very common means the family has some hereditary background. According to the doctor, the occurrence of the condition is rarely seen that explains blue complexion does not appear due to environmental change or traveling.
Answer:
.
Explanation:
Endocrine system uses chemical signaling (slow)
Nervous system uses electrical signaling (fasr)
C there your answer i hope it help
