Option b) It is because they have the same number of chromosomes.
Answer:D
Explanation: The pulmonary air sacs of birds only permit a unidirectional flow of air through the lungs. Unidirectional flow means that air is inhale and exhale through one trachea alternatively. This means the bird lungs only receive largely fresh air which has a high oxygen content during inhalation and do not receive fresh during exhalation. While air flow bidirectional in mammals.
Jellyfish are electric so when they come in contact with generators in coastal electric companies they shut down the system by absorbing all the electricity.<span />
Earth is natural and Technology has a thing that can make you sick......