Final answer:
Long-bodied, tall, stretchy animals are not necessarily more muscular, nor do they yield higher percentages of steaks from their carcasses, as muscle distribution and carcass yield are determined by genetics and other factors, not by the act of stretching.
Step-by-step explanation:
When referring to stretchy animals and their muscle development, it's important to note that the animal's overall body proportions and genetic makeup primarily determine muscle distribution and the potential yield of cuts like steaks from the carcass. The statement that long-bodied, tall, stretchy animals are more muscular and yield higher percentages of steaks from certain areas is not necessarily true. Therefore, the correct answer to the question is B) False.
Scientist B's research indicates that stretching does not affect bone growth or DNA, therefore not influencing the muscular or skeletal structure of the progeny in such a way as to yield higher steak percentages. Furthermore, muscle development and carcass yield are influenced by factors such as breed, diet, and exercise, rather than just the act of stretching for food as with long-necked giraffes.
In terms of collaboration within the body systems, the muscular system works closely with the skeletal and nervous systems to facilitate movement.