Leptin
Leptin is a hormone produced by the adipose
tissue of the human body. It is made up of 167 amino acids and it performs its
key role in the regulation of body weight, energy balance and endocrine
function. However, deficiency if leptin and its receptor in human will result in
obesity.
        
             
        
        
        
Answer:
no
Explanation:
"According to folklore, birds will reject their eggs and young if humans have so much as laid a finger on them. ... No matter how flighty birds appear, they do not readily abandon their young, especially not in response to human touch, says Frank B. Gill, former president of the American Ornithologists' Union."
 
        
             
        
        
        
When the organism become bipedal, they walk with 2 legs so there are 2 arms that were unused. Some of them try to use that hand by grabbing stick or stone, leading to tools. They start to think more to develop tools and their brain capacity become increased. 
The ability to use stone tools will help in food digestion since it can break the food easier. This reduces the needs for bigger teeth/jaw.
        
             
        
        
        
Answer:
How many times are you gonna ask? Imao
Explanation: when I’m in my room and no one is around to drown out my own noise, that’s when I feel the most lonely.
So it feels like SHlT