The answer is A. They have similar DNA sequences, That is the only way to determine if they share a common ancestor. It´s all in the blood.
In the case of Zane which is described above; he has been
feeling low for some weeks already, he is generally weak, he has difficulty
concentrating, he has gained nearly 10 pounds and sleeps 10 to 11 hours each
night. The diagnosis of his condition may be major depressive disorder.
The respiratory system brings oxygen into the lungs when you breathe. The digestive system breaks food down into nutrients such as glucose. Now the circulatory system enters the picture. ... The circulatory system also transports carbon dioxide waste from the cells to the lungs of the respiratory system
Answer:
we need lymphatic system too,it is as important as circulatory system.
Explanation:
The lypmphatic system is part of the circulatory system, known as lymphatic veesels.