Answer:
Competition for food happens when there is a limited amount of food resources available. The members of a species that eat that food who are best adapted to access the food are more likely to reproduce and pass on their genes to the next generation.
For example, we have a bird feeder with a narrow opening for food. The small-headed birds can reach the food, the bigger-headed birds cannot. If this was the only food source for this area, then over time, there would be more smaller-headed birds than large-headed birds, due to the competition for food and success/lack of success. 
 
        
             
        
        
        
The answer is A It protects the seed until it matures.
hope this helps
 
        
                    
             
        
        
        
The answer is B because it makes the most logical sense and the rest of the answered are obviously incorrect, it’s screaming “I’m wrong!!!”
        
             
        
        
        
Explanation:
if the organism has 5 of these characteristics, it belongs in the category of animalia... 
1). pulmonary function
2). DNA 
3). RNA
4). proteins
5). lipids
 
        
                    
             
        
        
        
Persian windmill blades were vertical, like propellers,  while European ones were horizontal, like egg-beaters.
<u>Explanation:
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A windmill is a functioning engine sort of thing. This transforms energy from the wind into rotational energy. For this reason this requires vanes called sails or blades. The very first windmills featured with long vertical shafts with blades designed like rectangles who lived in ninth-century Persia.
Six to twelve sails were produced of those windmills. The sails had been coated with matting reed or fabric. They differed greatly from the European editions. In 13th century China a similar nature of vertical shaft windmill with rectangular blades was found used for irrigation. Overall around 60 AD vertical axle windmills had been found in eastern Persia. In the 1180s northwestern Europe developed horizontal axle windmills. It is the form that is often employed today.