Answer:
Es importante que una persona tenga estabilidad emocional, social, y economica ante una situacion de embarazo para poder darle buena vida a el ser que lleva dentro. 
Explanation:
Es importante tener estabilidad mental para pensar que hacer y como cuidar al bebe, y ser positvos.
Es importante tener estabilidad social para brindarle un ambiente amistoso.
Es importante tener estabilidad economica para poder aportar a las necesidades del bebe. 
 
        
             
        
        
        
True. A protein becomes functional only when it reaches its tertiary shape (3D). It is not necessary for the protein to reach the quaternary stage, but that is just a more complex functioning protein. It really is just two tertiary merged together. Example is red blood cells.
        
             
        
        
        
Answer:
A chemical element is a type of atom with the same number of protons in their <u>atomic</u> nuclei. 
Explanation:
For an example, the atomic number of Chlorine is 17, and there is 17 protons in Chlorine.
If you have any questions feel free to ask in the comments.
 
        
                    
             
        
        
        
Answer:
Sexual reproduction:
Pros: leads to greater genetic variation. 
Cons: requires more time and energy. 
Asexual reproduction: 
Pros: Does not require finding a mate. 
Cons: Produce less genetic variation. 
Explanation:
Sexual reproduction is a type of reproduction in higher organisms, in which new individuals are formed by combining genetic information from two different types (sexes) of individuals. 
Advantage: Sexual reproduction leads to higher genetic variation due to recombination between genetic material of female and male gamete during meiosis. 
Disadvantage: Sexual reproduction is a time and energy consuming process as it needs interaction between mates and organisms which are produced sexually require more time for development. 
Asexual reproduction involves formation of new organisms from a single parent organism without gamete fusion. 
Advantage: Asexual reproduction requires less time and energy as it does not require finding a mate. 
Disadvantage: Asexual reproduction produces less genetic variations as it involves only parent organisms (no mixing of genetic information) and the only source of variations are random mutations.