Answer:
Ocean water is a mixture! Salt and water together, makes salt water, since the salt dissolves in it. 
Normal water in a cup, though, is a pure substance. Nothing is in it, and its purified, so it is not a mixture. 
If it's more than one things, it's a mixture!
I hope this helps! 
 
        
             
        
        
        
You can use the volume displacement method. If you had the alligator in a tank and you knew how much the volume of water in the tank was before the alligator was in there you could subtract that from the volume of the water with the alligator in the tank.
        
             
        
        
        
Females are A. XX. Males are XY :)
        
                    
             
        
        
        
<u>Answer:</u>
All the individuals of a species that live together in one place at the same time  is called as population. 
<u>Explanation:</u>
- When organisms of same group or species live in a particular area they are defined as population. 
- Along with living in a particular area the species should also have the 'capability of interbreeding' in order to be called as population. 
- Demography is a social science that deals with the 'statistical study of population'.
- A term 'sex population' is often visualized in 'population genetics', it refers to a organisms group in which a 'pair of members' can breed together.