Answer:
What is a. A; A
Explanation:
Drop 1 struck the surface from direction A, and drop 2 struck the surface from direction A.
 
        
             
        
        
        
The branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
        
             
        
        
        
DNA and RNA both produce proteins, but RNA copies itself and moves out of the nucleus while DNA stays inside the nucleus and produces proteins. Also DNA helps more in cell division, while RNA helps in making proteins.
        
             
        
        
        
Is your testicles swollen ? You should go see a doctor. Especially if there’s pain.
        
                    
             
        
        
        
<h2>
Correct Answer is (D)</h2>
Explanation:
     (D) distinguishes among microorganisms based on some enzymatic or metabolic ability.
- <em>The prokaryotic microorganisms incorporate the microscopic </em>organisms and the archaea (or the eubacteria and archae bacteria, by more seasoned phrasing). 
- The eukaryotic microorganisms incorporate the protists (protozoa), the parasites and in any event the <em>unicellular  algae.  
</em>
- Mycoplasma genitalium, a parasitic bacterium which lives in the <em>primate bladder, squander removal organs, genital, and respiratory tracts,</em> is believed to be the littlest known life form fit for free <em>development and multiplication.  </em>
- Microscopic organisms that expect oxygen to develop are called <em>obligate aerobic bacteria</em>