Answer:
D
Explanation:
An oil boom helps contain the oil so that it is easier for them to skim it off of the water. They aren't meant to clean up oil, only to contain the oil since it does not sink or mix with water.
 
        
             
        
        
        
Answer:
Researchers also found that the longer a male's tail feathers, the faster he was able to shake them. This effort would require more muscular strength, and might be a powerful signal of fitness to the females.
Explanation:
 
        
             
        
        
        
The answer is D. NADH to NAD+
When no oxygen is present, anaerobic respiration occurs.It is the only way to produce ATP in this condition.NAD+ is necessary because it is converted into NADH and at the same time ADP is converted to ATP in the reaction of pyruvate synthesis from glucose.Therefore, NADH must be converted to NAD+ in order to have NAD+ always present in the cell.
        
             
        
        
        
Explanation:
The niche of the plant is the role of the organism in the ecosystem. A plant's niche is essentially what the plant does in the  environment. 
- It entails the interaction of the plant with biotic factors of the ecosystem such as other plants and the animals. 
- It also include the interaction of the plant with the abiotic factors in the ecosystem such as the soll, air, water e.t.c 
Learn more: 
Niche brainly.com/question/2321688
#learnwithBrainly
 
        
             
        
        
        
Answer:
A question is developed from some observations and the hypothesis is a tentative explanation for that
Explanation: