b. Gravitational constant
Explanation:
G in the universal gravitation formula represents the gravitation constant. It's value is  2.071×10⁻⁴³ s²⋅m⁻¹⋅kg⁻¹.
- The law of universal gravitation states that "the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance separating them". 
Mathematically, the law is expressed as: 
             F = G
Where F is the gravitational force
             G is the gravitational constant
             r is the distance 
             m is the mass 1 and 2 bodies
Learn more: 
Gravitational force brainly.com/question/1724648
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Because these non native species can cause competition for the same food source as the native species thus making it harder for the native species to survive. Also the non native species could see the native species as food causing them to die out. As well as introducing new diseases that these native species don’t know how to defend themselves from
        
             
        
        
        
Answer:
im not but i would love to
Explanation:
so tell me in the comments how would you prepare for neet
 
        
             
        
        
        
Answer:
Why has this work been written?
Who is the audience and what is the message?
Is it sponsored? Has a group or company paid the author to make these claims? Consider, for instance, lobby groups, special interest groups, corporate entities etc.
Is it biased? Is the author affected by political, social, economic, environmental, religious, cultural, personal or any other bias?
Explanation:
 
        
                    
             
        
        
        
Answer:
The correct answer is D. is a facultative anaerobe
Explanation:
A facultative anaerobe is the organisms that can live in the absence of oxygen but prefer to utilize the oxygen when oxygen is present in the environment.  
An anaerobic organism requires more amount of energy sources like carbohydrates because they use the fermentation process to make energy and this process results in the formation of less energy than aerobic respiration.  
All the bacteria of family Enterobacteriaceae that live in the intestine are facultative anaerobes. Therefore facultative anaerobe can thrive in both the presence and absence of oxygen so the correct answer is D. is a facultative anaerobe.