Answer:
first question:  3. osmosis is a kind of diffusion that involves the movement of water
2nd question:  1. it allows carbon dioxide to move in and out of the cell
Explanation:
 
        
             
        
        
        
The answer is d. :) you got this! 
        
             
        
        
        
Answer:
B)Cholesterol in the membrane
Explanation:
Membrane fluidity is affected by fatty acids. More specifically, whether the fatty acids are saturated or unsaturated has an effect on membrane fluidity. ... Membrane fluidity is also affected by cholesterol. Cholesterol can make the cell membrane fluid as well as rigid.
 
        
             
        
        
        
Answer: Potassium-40 decays into argon gas over time.
Explanation: Potassium-argon dating is a dating method used to determine the age of sedimentary rocks by comparing the proportion of K-40 to Ar-40 in a sample of rock, and knowing the decay rate of K-40.
Potassium-40 undergoes decay following first order kinetics as given below:

 
        
                    
             
        
        
        
Answer:
Things they have in common..
Explanation:
- Non living things and living things are made up of matter.
- Both occupy space
- The also have weight,colour,shape etc
- Both Non living and living things are characterized by their type..