Answer:
The answer is A. Human activities have a greater impact on terrestrial and freshwater ecosystems.
Explanation:
 
        
                    
             
        
        
        
Answer:
Phenotypes
Explanation:
Heritability refers to the extent to which trait variations among individuals are attributable to their differing observable and most often definitive or measurable physical features, often called phenotypes. Examples of this variation could be something like height or eye colour. Basically it has to be traits that depend on genetics that environmental factors
 
        
             
        
        
        
The answer is D, because it is a form of camouflage and an adaptation to the environment for self defense
        
                    
             
        
        
        
Answer:
Exponential growth assumes that environmental factors like food, water supply, space, shelter, disease organisms, predators, weather conditions, and natural disasters do not affect the birth or death rate. As long as birth rate exceeds death rate (even slightly) population size will increase exponentially.
Explanation:
 
        
                    
             
        
        
        
Answer:
C) lumbar vertebrae; short, flat spinous processes 
Explanation:
The Lumbar Vertebrae are bigger and stronger than vertebral bodies in certain positions. 
The vertebral bodies and disks bares majority of the body weight of the body. The lamina, facets and spinous process are basic components of the posterior materials that assist in guiding the movement of the vertebrae and as a coverage or protective shelter for the spinal cord. 
The spinous process are SHORT and STURDY (FLAT) in the Lumbar Vertebrae. Hence, this explain why it is often referred to as "Hatchet-Shaped".
The attached image as red dots meant to point to the spinous process in the Lumbar Vertebrae.