C) the changes reflect...
Warm blooded animals living on land
External respiration (correct answer) involves the exchange of oxygen and carbon dioxide within the environment.
The exchange of wastes through the skin is just called excretion by sweating.
There is no exchange of nutrients that occur in the lungs but rather absorption of nutrients is the function of the gastrointestinal tract.
The exchange of oxygen and carbon dioxide within the cell is called cellular respiration and involves carrying oxygen from the blood to the cell then the cell uses it as the final electron acceptor in the electron transport chain. The metabolic wastes of the cell, primarily carbon dioxide, goes now to the bloodstream to be exchanged for oxygen in the lungs.
Since they are now able to genetically isolate favorable traits they can "clone" prize-winning livestock and make the production as efficient as possible
The phase of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase.
