All the nerve bundles of the body are routed through the backbone and are called the spinal :

a : cord
b : vertebrae

pregnancy happens more and more

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

the answer is c a tornado

the answer is c. altitude. hope this ! #brainiac