In terms of function, bird wings are used to flap transversely, whereas butterfly wings are used to flap laterally. In terms of structure, bird wings are filled with hollow bones for easier flight, whereas butterfly wings are structured by scales and tiny hairs.
        
             
        
        
        
Very powerful microscopes were needed before cells could be observed in detail
        
             
        
        
        
Answer:
New Zealand: 46 people per square mile.
Australia: 7 people per square mile.
Explanation:
 
        
             
        
        
        
Low infiltration capacity means that the soil cannot absorb much water per volume. The first step in erosion in a landscape dominated by low-infiltration capacity is the raindrop splash. This is where raindrops displace the soil from their original place because the soil cannot absorb adequate amounts of water.