Answer:
Selective breeding of normal sheep with too much wool sheep.
Explanation:
Selective breeding can lead to some sheep overheating from having too much wool if the sheep of having more wool is crossed with normal wool so the offspring is produced with huge amount of wool on their body that keep its body warm in winter season and overheat in summer season. So the sheep shed their hairs in the summer season in order to reduce overheating of the body.
Answer:
1. The physiological changes that will occur when someone lives at altitude for an extended period include increased production of more red blood cells.
2. The changes are advantageous as the person can survive lower altitude better and strenuous activities that interferes with breathing.
3. The specific physiological pathway that results in the changes described involves decrease in pulmonary ventilation at high altitude leading to hypoxia then hypoxemia. The body then produces more red blood cells to counteract the lower oxygen saturation in blood in high altitudes.
<span>The wings on
the beetles are examples of vestigiality. Vestigiality is a structure with
attributes that have apparently loss its ancestral function but stil present
during evolution. It is a normal evolutionary process in the changing
environment that does not pressure them to evolve.</span>
