Answer:
A tadpole is the larval stage in the life cycle of an amphibian. Where as a froglet is a semi metamorphosed Tadpole. A froglet is still in the process of becoming a frog, through tice the froglet will slowly metamorphoses futher to its adult and final stage. 
Explanation:
 
        
             
        
        
        
Chordates are animals that possess certain characteristics including a notochord. Humans fall into this category along with many vertebrates such as whales, falcons etc; therefore, all of the answers apply.
Food, research, therapy, entertainment affection.
        
             
        
        
        
Answer:
Co2 and H20 
Explanation:
(won't explain because ur in a rush!!!) 
 
        
                    
             
        
        
        
Answer:B, D
Explanation:
When the roller coaster starts flying down the hill, it gains kinetic energy and loses potential energy.
 
        
             
        
        
        
Answer:
Down syndrome occurs when the nondisjunction occurs with Chromosome 21. Meiosis is a special type of cell division used to produce our sperm and egg cells.