Archaea<span> and </span>bacteria<span> have generally similar </span>cell<span> structure, but </span>cell<span> composition and organization set the </span>archaea<span> apart. Like </span>bacteria<span>, </span>archaea<span> lack interior membranes and organelles. Like </span>bacteria<span>, </span>archaea cell<span> membranes are usually bounded by a </span>cell<span> wall and they swim using one or more flagella.</span>
        
                    
             
        
        
        
proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macro molecules. the functions of proteins are very diverse because there are 20 different chemically distinct amino acids that form long chains, and the amino acids can be in any order. For example, proteins can function as enzymes or hormones.
 
        
             
        
        
        
World population stops growing
        
             
        
        
        
Answer:
????
Explanation:
None of those seem to be correct to me.
1. Observations are made using the five senses- sight, sound, touch, taste, and smell. So this is invalid.
2. Observations and experiments can both be done anywhere
3. See answer to 2
4. It's cut off? But observations can literally be as simple as looking at a stick and noting that it's brown, so from what I can read, it's invalid.
 
        
             
        
        
        
Alleles
I had bio a while ago though so I could be wrong...