The skeletal system protects the internal organs as it gives the body shape, form, and mobility while providing protection for internal organs.Bones/the skeletal system also protect internal organs from injury by covering or surrounding them. For example, the skull(cranium) protects the brain
Answer:
The population of fish with pelvic spines that arrived in the lake at time B evolved a reduced pelvis over time (beginning at time C).
(Having a reduced pelvis must have been advantageous for this ancient stickleback population, just as it is for many current freshwater stickleback populations.)
Antibodies- I hope that helps :)
Its hiv that kills lymphocytes im pretty sure
