C. cell wall. This discovery was made by Robert Hooke upon studying the honeycomb like structure of cork and compared it to the dead appearance of the cell wall.
People with O+ blood cannot donate their blood to negative blood types, while people with O- blood can donate to any blood type. This makes them the "universal donor." However, they can only receive O- blood.
The respiratory system regulates oxygen flow, and provides regulation for oxygen blood content. Circulatory system plays a roll in providing enough oxygenated blood to the body
Because the common cold is cause by a ‘virus’.......
The answer is VIRUS
It seems that you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. If one parent is homozygous for a recessive allele and one parent is heterozygous for a recessive allele in an autosomal dominant genetic disorder, the chance that <span>a child of those two parents will have the disorder is 75%. Hope this helps.</span>
