Answer:
B and D
Explanation:
Since it says all carbon atoms have six electrons, we know that they only have six protons too. The carbon 13 and 14 means they have extra neutrons that increases their atomic mass.
 
        
             
        
        
        
Answer - Many Types Such as 
Golgi Body
Mitochondria
Nucleus
Chloroplast 
Endoplasmic Reticulum 
Reasoning - These are specialize Organelle which function in each part of doing their duty require the layers to keep it separate in maintaining certain materials they receive within the cell.
 
        
                    
             
        
        
        
Answer: The organic molecules required for building cellular material and tissues must come from food. Carbohydrates or sugars are the primary source of organic carbons in the animal body. During digestion, digestible carbohydrates are ultimately broken down into glucose and used to provide energy through metabolic pathways.
Hope this helps...... Stay  safe and have a Merry Christmas!!!!!!!! :D
 
        
             
        
        
        
Answer:
The two forms interbreed and their offspring survive and reproduce well.
Explanation:
When talking about classification of species, one of the first features observed is the species fitness, which describes the reproductive success or their ability to leave to their successive generations the most copies of their genotype. When different species that were recently divided into 2, by geographic isolation, for instance, usually there is no genetic compatibility, and if its possible to produce offspring, there might be some development issues like infertility. 
 
        
             
        
        
        
I would pick H but it might be J but I am pretty sure it is H so go with that ok if you need any thing else I will help you ok