Nearly all mammals have seven cervical (neck) vertebrae. this fact implies that a. all mammals have to stretch their necks to obtain food. b. all animals can turn their heads the same amount. c. all mammals descended from a common ancestor. d. predators prefer to eat animals with either six or eight cervical vertebrae.
The correct answer is option c- nearly all mammals descended from common ancestors.
Human cervical vertebra consists of 7 bones from top to bottom:
Cervical vertebra are located just below the skull are the neck bones that control the neck movements. In humans, cervical vertebrae are the smallest of all vertebrae. In different organisms, the size of these vertebrae vary.
clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.
thymine. in rna, thymine is replace by uracil