B. trenches .......................
        
                    
             
        
        
        
Answer:
The Amazon is a critical absorber of carbon of carbon dioxide, a greenhouse gas produced by burning fossil fuels, like oil and coal. ... The Amazon absorbs 2 billion tons of CO2 per year (or 5% of annual emissions), making it a vital part of preventing climate change.
Explanation:
 
        
             
        
        
        
Answer:
Following are the organelles present in the cell.
nucleus
mitochondria
ribosomes
lysosomes
endoplasmic reticulum
vacuole
Golgi bodies
Explanation:
Nucleus is the central part of the cell which control all activities in the cell. Mitochondria is also called power house of the cell which is responsible for the production of energy for the cell. Ribosomes and endoplasmic reticulum  are responsible for the production of proteins. Lysosomes collects and removes the waste material from the cell. Vacuole store nutrients and food materials for the cell while golgi bodies modifies  the protein.
 
        
                    
             
        
        
        
Answer: The peptide sequence that is essential for protein insertion, orientation in membrane and for travelling into particular organelle is called a topogenics.
Explanation: Integral membrane proteins are found in all cellular membranes and carry out many of the functions that are essential to life. The membrane-embedded domains of integral membrane proteins are structurally quite simple, allowing the use of various prediction methods and biochemical methods to obtain structural information about membrane proteins.
 
        
             
        
        
        
Answer:
they need to be able to maintain their salt content, thru osmoregulation