A place where animals and plants are protected is an ecosystem
        
             
        
        
        
Answer:
Red blood cells and the heart causes response to stimuli
 
        
             
        
        
        
Answer:
1. Nucleus
2. Nuclear DNA
3. Chromosomes. They contain the DNA.
4. This is DNA. DNA contains the instructions needed for an organism to develop, survive and reproduce.
 
        
                    
             
        
        
        
Answer:
The cell will shrink
Explanation:
In an hypotonic solution, water moves into the cell through the process of osmosis. This shall be due to the high concentration of water in the hypotonic solution than that in the cytoplasm.
Due to this movement, the cell bulges out.
If the cell is transferred to a hypertonic solution, water shall move out of the cell thereby making the cell shrink. This is because water concentration in the cytoplasm shall be higher than that in the hypertonic solution.
Effect to the survey shall be an experience of the exact opposite of the previous immersion.
 
        
             
        
        
        
I think b. Proteins are polymers of amino acids is the correct answer