D. They had larger beaks. 
Due to the drought they would need to dig deeper for food. But their tiny beaks could not do that. So over time their beaks grew and adapted to the drought. Therefor the answer is D. They had larger beaks!
Hope this helped! <3
 
        
             
        
        
        
Eukaryotes contain linear chromosomes and therefore require telomerase to prevent loss of the ends of the chromosomes
        
             
        
        
        
Answer:
seven(7) different gametes can be produced 
 
        
             
        
        
        
Answer:
- covers and lines body surfaces
- minimal intercellular substance 
- cells are densley packed together
- cells rest on basement membrane 
- simple (single line of cells) and stratified (multiple layers)
- squamous (oval like shape), cuboidal (cube shape), columnar (long rectangle shape) 
- vascular (tissue doesn't have its own blood supply)
Explanation:
Hope this helps!