Because bacteria is more of a virus and they kind of like go away from it and when u get them together it can make a sickness...
Hope this helps :)
        
             
        
        
        
The correct answer is option A, that is, jaw or jawless fishes.
Agnatha refers to the superclass of jawless fish in the phylum Chordata, subphylum Vertebrata, comprising of both the extinct (conodonts and ostracoderms) and present (cyclostomes) species. It comprises the group of all vertebrates with jaws, that is, gnathostomes.
On the other hand, there are two categories of living fish with jaws. The Osteichthyes (the bony fish) and the Chondrichthyes (the cartilaginous fish). Both the categories of fish comprises of two pairs of lateral fins and a finned tail for impulsion in water.
 
        
                    
             
        
        
        
Oxygen and glucose are produced during photosynthesis and are used as the precursors for cellular respiration. Carbon dioxide, water, and ATP are produced during cellular respiration, and these substances—along with sunlight—are the precursors for photosynthesis.
<h3>What compounds do photosynthesis generate and what do cells respire?</h3>
- Water and carbon dioxide are changed into oxygen and glucose during photosynthesis. The plant consumes glucose and produces oxygen as a byproduct.
-  Oxygen and glucose are transformed into water and carbon dioxide during cellular respiration. By-products of the process include carbon dioxide, water, and ATP, which is turned into energy.
- The process by which plants convert carbon dioxide, water, and sunshine into oxygen and sugar-based energy is known as photosynthesis.
To learn more about Photosynthesis refer to:
brainly.com/question/19160081
#SPJ4
 
        
             
        
        
        
When a sperm and an egg unite , they form a zygote
        
             
        
        
        
Answer:
A heart transplant is an operation in which a diseased, failing heart is replaced with a healthier donor heart.
Explanation:
hope it kinda helps