If the inner lining of the air sacs neither thin nor highly vascularized, then it can be inferred that AIR SACS ARE CANNOT BE THE SITES OF GASEOUS EXCHANGE BETWEEN AIR AND BLOOD. Air sacs are generally lined with mucus and surrounded with blood capillaries.
In case of birds, air sacs play an important role in respiratory system.
At a glance this one's confusing, I agree.
Genetic engineering has made it easier for forensic scientists to differentiate human DNA beyond simple blood sampling. This inevitable led to release of innocent accused prisoners.
<span>The difference is the source of the material. Spoils come from overburden and is discarded as waste. Tailings come from left over dredging of stream beds that are discarded as as waste as well.</span>
Answer:
The offspring of the P generation is referred to as the first filial generation (F1).