A,B,C and D
A. increase in the number of available neurotransmitters 
B. decrease in the number of available neurotransmitters 
C. increase in the number of receptors and receptor sites 
D. the ability of the synapse to change in strength and function when the pathway is overused or underused
 
        
             
        
        
        
<span>Actually the information or data in the catalog DB or data base connection takes place by relevance and then mainly here we get the search string or required data which we want or entered, with clear exact search filters which has been directly chosen, and hence these will be at the top of the results list for sure.</span>
        
             
        
        
        
<h2>Answer </h2>
- Hybridization
- Recombinant DNA
- Selective Breeding
<u>Explanation</u>
1. Cross-breeding; a method that unionizes gametes of differing genes to create a new individual is hybridization. It is the idea of combining atomic orbitals into different hybrid orbitals that is proper for the pairing of electrons to create chemical bonds in valence bond as per the atomic theory. 
2. Cultured DNA molecules from different biological sources is recombinant DNA. They are the molecules are DNA molecules determining by laboratory techniques of genetic recombination to take mutually genetic material from various origins.
3. A process of breeding organisms because of their specific traits is selective breeding. It is the method that grants humans practice animal breeding and plant breeding to selectively develop selective over phenotypic traits 
 
        
        
        
The job of the tendons is to connect the muscle to the bone. I hope this helps
        
                    
             
        
        
        
Answer:
A factor of an experiment is a controlled independent variable; a variable whose levels are set by the experimenter. A factor is a general type or category of treatments. Different treatments constitute different levels of a factor
An experiment has several types of variables, including a control variable (sometimes called a controlled variable). ... A control variable is another factor in an experiment; it must be held constant. In the plant growth experiment, this may be factors like water and fertilizer levels.
Explanation: