Answer AND Explanation:
Gnetophytes are gymnosperms
, they are woody  and the embryo has two cotyledons
. Cycads are woody plants that produce seeds found in Subtropical and warm temperate regions and also they produce motile sperm cells.
 
        
             
        
        
        
One reason is that the two kinds of birds live in two different types of environments and also the sharp billed ground finch does not just it plant matter. It feast on the blood of bigger sea birds. This is an adaptation that it has so it does not have to eat plant matter and compete for food
        
                    
             
        
        
        
Answer:
When carbon dioxide concentrations drop, Earth cools, some water vapor falls out of the atmosphere, and the greenhouse warming caused by water vapor drops.
Explanation:
 
        
             
        
        
        
The answer is A- double carbon bond