Answer:
A. Skin color, a polygenetic trait, is also determined by environmental factors.
Explanation:
When you are a lifegaurd you are outside much more which means you are very likely to get a tan; Therefore changing the pigment of Pat's skin.
I hope this helps you :) Have a nice day!
<h2>Expiration </h2>
Explanation:
Inspiration and expiration occur due to the expansion and contraction of the thoracic cavity, respectively
- Inspiration is the process that causes air to enter the lungs whereas expiration is the process that causes air to leave the lungs
- Expiration is typically a passive process that happens from the relaxation of the diaphragm muscle (that contracted during inspiration)
- Exhalation begins when inhalation ends
- Pleural cavity’s increased negative pressure leads to air uptake during inhalation, the pleural cavity will contract during the exhalation (due to relaxation of the diaphragm),which exerts pressure on the lungs and causes the pressure inside the cavity to be less negative
- An increase in pressure leads to a decrease in volume inside the lung, and air is pushed out into the airways as the lung returns to its smaller size
- The pleural cavity is so important to breathing because it’s pressure changes the volume of the lungs, and it provides a friction-less space for the lung to expand and contract against during breathing
Answer:
A. the hippocampus is one of the last brain structures to mature
Explanation:
hippocampus is the part of brain which plays an important role in learning an d memory. AS infantile amnesia is the inability of the person to recall the events occurs between 2 to 4 years and also before the age of 10 with passage of time.
the fast birth of cells in the hippocampus during prenantal period and neurogenesis is responsible for having inability of long lasting memories.
