Answer:
https://phys.org/news/2009-05-bird-songs-environment.html
Explanation:
 
        
             
        
        
        
Answer:
B). Both are endotherms
Explanation:
Both birds and mammals are warm-blooded, which is the meaning of endotherm.
Hope this helps!
~PurpleMist
 
        
                    
             
        
        
        
The two sources of information used to direct the expression of genes during various stages of development are Transcription and Translation.
<h3><u>Explanation:</u></h3>
Both of them combined is called gene expression.Transcription is the process of sharing information stored in a DNA to RNA.
The process of translation is carried out in cytoplasm. Here, the mRNA, in which stands for messenger, send messages to a more complex and specialized molecule called the ribosome. The sequence present on the mRNA base is read by the ribosome.
Transcription takes place in nucleus and translation takes place in Cytoplasam. The products of transcription are mRNA, tRNA, rRNA. The products of translation are Proteins.
 
        
             
        
        
        
Answer: I’d say True 
Explanation: Genetic drift can result in the loss of rare alleles, and can decrease the size of the gene pool. Genetic drift can also cause a new population to be genetically distinct from its original population, which has led to the hypothesis that genetic drift plays a role in the evolution of new species.