Answer:
These group of muscles called erector spinae muscles arises from a tendon in the sacral area and pelvis, it extends up to the occipital bone.
Erector spinae muscles originates from the SPINOUS PROCESSES of T9-T12 of the thoracic vertebrae and inserts into the SPINOUS PROCESSES of T1-T2 of the cervical vertebrae
They therefore run vertically on either side of the spine (medially and laterally).
a. True
b. False
Natural selection is a process by which organisms better adapted to their environment tend to survive, reproduce, increase in number, and pass their traits to succeeding generations. Adaptations are inherited or learned traits that increase an organism's chance of survival in an environment. Evolution is a process of change in a population through genetic variation over time. Natural selection drives evolution.