DNA replication is semi-conservative because only one half of the DNA helix is replicated
        
                    
             
        
        
        
They float around and they give signals
        
                    
             
        
        
        
Answer: Las células son las unidades de construcción más básicas de la vida. Todos los seres vivos están compuestos por células.
Explanation:
 
        
             
        
        
        
Answer:
Happy cats blink eyes, keep whiskers forward and tail relaxed; Aggressive Cat lowers tail and make it stiff, crouches etc; an Angry cat is rigid and curls itself around its body and a Depressed cat sleeps more than usual.
Explanation:
A Veterinary  assistant must be well aware about different body languages of cat. Cats show different body postures in different moods.  
i)	HAPPY CAT- A happy cat returns our gaze with a blink an eye and there will be a dilation in the eye that indicates happiness and tail will be relaxed.
ii)	AGGRESSIVE CAT- An aggressive cat can both be defensive and offensive. Offensive body language includes- stiff and straight leg, lowered stiff tail and a defensive language includes- Crouching of body and eyes completely dilated.
iii)	ANGRY CAT- Angry cat has a rigid posture, growls and make its body curled up and make itself look large.
iv)	DEPRESSED CAT- Depressed cats hold its ear back and make their fur stand at the end, they tuck their tail and sleeps more than usual.