Answer:
<em><u>Mammalary skin</u></em>
Skin is layered
Have hairs on it.
Acts as protectector 
not so hard as epidermal
<em><u>Epithelial</u></em>
Can be layered
Dont have hair
Acts as protective layer also supports plants
Its hard
 
        
             
        
        
        
Answer:
oxygen, hydrogen peroxide and the halogens.
Explanation:
 
        
             
        
        
        
The right answer for the question that is being asked and shown above is that: "a.Cyanobacteria are photoautotrophs." The atmosphere that we depend on for our survival is enriched by numerous cyanobacteria. This fact justifies the characteristic of cyanobacteria that is Cyanobacteria are photoautotrophs.
        
                    
             
        
        
        
Explanation:
cAMP binds to protein kinase A and activates it, allowing PKA to phosphorylate downstream factors to produce a cellular response. cAMP signaling is turned off by enzymes called phosphodiesterases, which break the ring of cAMP and turn it into adenosine monophosphate (AMP).
 
        
             
        
        
        
Answer:
(08) and (32)
Explanation:
To make osmosis happen there has to be a difference in the concentration of solutes, between the inside and the outside of the cell. To valance this difference in concentration, water has to flow towards a place that has a higher number of solutes. 
The lipids in the cell's wall make this membrane semipermeable. This allows the passage of specific components only, such as water through aquaporins. Lipids and other elements are of importance in the barrier because they maintain the cell separated from the outside, allowing it to be balanced as regards the different substances that can interact with it.