A population decrease in primary producers would affect the ecosystem negatively because everyone who ate the primary consumers would have a lack of food.
        
             
        
        
        
Scientific information refers to the classification, collection, dissemination, and retrieval of recorded knowledge treated both as a pure and as an applied science. The two features of a scientific information source, which may suggest that the information is not reliable are:  
1. The information is based on data that are not peer-reviewed, that is, the information has not been reviewed by the experts in the field, or is not encouraged by an accord of experts in the field.  
2. The references are not cited, that is, it not clear or not known that from where the information originated.  
 
        
             
        
        
        
Answer:
D. An ecologist publishes data funded by a construction company which supports their original hypothesis that an endangered animal's territory is not endangered.
Explanation:
:)
 
        
             
        
        
        
Explanation:
It's a soft metal, reactive and with a low melting point, with a relative density of 0,97 at 20ºC (68ºF).