<span>Yes,
there are mammals that lay eggs instead of giving birth to a live young. These mammals
are called Monotremes. One best example to this is the platypus and echidnas.
Platypus, which is also known as the duck-billed platypus, is a semiaquatic
egg laying mammal. Echidnas on the other hand are also called as spiny eaters.
Echidna and platypus are only the surviving members of the Tachyglosside. And are
the sole extant egg laying mammal</span>
        
                    
             
        
        
        
Molecules of mRNA are composed of relatively short, single strands of molecules made up of adenine, cytosine, guanine and uracil bases held together by a sugar phosphate backbone.
 
Hope This Helps, Lexi
 
        
             
        
        
        
D.  A variable or alteration to one part that affects an entire system
Explanation:
When talking about natural and physical systems, change is a variable or alteration to one part that affects an entire system. 
Systems are groups of processes that have the same overall function. There are several types of interacting components that makes up both physical and natural systems in our world.
- The part of  system is related and interconnected via the changes they undergo. 
- Changes typically causes variation or alteration of parts of a system. 
learn more: 
Biogeochemical cycle brainly.com/question/3509510
#learnwithBrainly
 
        
             
        
        
        
Answer:
The central nervous system (CNS) controls most functions of the body and mind.
i think this is it
Explanation:
 
        
             
        
        
        
Answer:
Probably forest land but that is just my guess
Explanation: