Answer:
Increased exposure to X-rays
Explanation:
X-rays shoot harmful radiation through your body, that's why when you go to the dentist or other places and they take a X-ray they give you a lead vest to protect your organs from unneeded radiation.
hope this helps :)  
 
        
             
        
        
        
The correct answer is Galen.  
Galen considered anatomy as the foundation of medical knowledge, and he recurrently dichotomized and tested on the lower animals like pigs, sheep, and goats. Galen's supported dissection as the method to better the skills of surgery and research works.  
In his work, he illustrated seven pairs of cranial nerves, observed the structural distinctions between the veins and arteries, and illustrated the valves of the heart.  
 
        
             
        
        
        
 First thing is Male gametes are called sperm and Female gametes are called eggs. So some physical differences are that the eggs are spherical in shape, much larger then sperm, and are immobile (they stay in the female reproductive organ during fertilization). Sperm are smaller, are in a cone shape, and have tails so the could move to the egg during fertilization.
 
        
             
        
        
        
<span>The somatic nervous system is known as the voluntary nervous system, is a part of the peripheral nervous system. It consists of neurons that are associated with skeletal or striated muscle fibers. It affects voluntary signaling for many resion. A large part of the PNS is composed of 12 pairs of cranial nerves and 31 pairs of spinal nerves.</span>
        
             
        
        
        
Answer:
Homologous structures can be described structures which originate in different organisms from a common ancestor and may or may not have the same functions.
Zeuglodons can be described as ancient whales and Orca is a common whale today known as the killer whale.
<u><em>Scientific studies show that Zeuglodans and Orca have many structures in common such as:</em></u>
- <u><em>Having teeth with two roots</em></u>
- <u><em>The presence of nostrils</em></u>
- <u><em>Pelvis and internal femur bones</em></u>