B is correct
Acids are molecular compounds that release hydrogen ions. A binary acid consists of hydrogen and one other element.
        
             
        
        
        
Answer:
D
Explanation:
This is the more likely explanation, as there must be a limit to leg length in an animal that has to run very fast and strain their muscles and bones to the limit to do so. 
As for the other options, there is no evidence to conclude that the genes that are involved in cheetahs leg length do not undergo mutation because the population exhibits a variety of leg lengths. Neither can we conclude that there are any isolated subgroups in the pupulation. Natural selection does act upon the traits involved in predation, as the question starts by saying that the faster a cheetah can run the more likely it is to capture its prey.
 
        
             
        
        
        
Answer:
People are call people because a group of human being in a group is call people; we're all people.
Explanation:
 
        
                    
             
        
        
        
Explanation:
A tendon is a fibrous connective tissue which attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure. A ligament is a fibrous connective tissue which attaches bone to bone, and usually serves to hold structures together and keep them stable.
 
        
                    
             
        
        
        
The terrestrial planets are Mercury, Venus, Earth, and Mars. 
Here's the explanation in regards to the Goldilocks Theory.
The Goldilocks Theory is often used by astrologists to describe the conditions of Earth's positioning in the solar system. The Goldilocks Zone was described by Stephen Hawking as "like Goldilocks, the development of intelligent life requires that planetary temperatures be ‘just right’” The Goldilocks theory argues that a planet must be neither too far away from nor too close to a star and galactic center to support life, while either extreme would result in a planet incapable of supporting life. Terrestrial planets such as Mercury, Venus, Earth, and Mars are more likely  to lie in the Goldilocks zone due to their close proximity to their home star along with other crucial factors that allow for life to exist.