The answer is B. both need food and air
Answer:
Explanation: cloning is asexual because it is a clone and is not different for example you cloning yourself it will have the same DNA
Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
There is one extra 21 comosome which is why it is down sydrome.
