Answer:
Oxygen and nitrogen
Explanation:
Oxygen and nitrogen are very electronegative than any other element in the periodic table hence they have more tendency to attract an electron towards itself
 
        
             
        
        
        
Answer:
The populations of many species increase and decrease in a similar pattern as the alligator.
Explanation:
Since alligators in Florida are a keystone species, other species rely on it as well to keep everything in balance. Keystone species maintain structure, stability, and diversity in an ecosystem.
 
        
             
        
        
        
I n the F1 generation, there will be no recessive offspring but in the F2 generation there is a 25% of offspring being recessive.
You can find more info about percentages by observing images. called Punnett Squares.
Hope it helped,
BioTeacher101
        
             
        
        
        
The answer is B. both need food and air 
        
             
        
        
        
Answer:
http://mairscience.weebly.com/uploads/5/7/8/8/57880837/8th_grade_key_2015_sol_released_test.pdf
Explanation: