1. ribosome
2. false
3. true
4. 3
5. all eukaryotes
6. true
7. mitochondria
        
             
        
        
        
Answer:
The best way to determine if these populations form part of the same species is to study the existence of reproductive isolation between populations. Moreover, the result of an experiment based on the study of reproductive barriers may be complemented with molecular biology approaches that determine the level of sequence homology between populations
 
        
             
        
        
        
The correct answer is option C
Reason: 
The Earth's magnetosphere is the outer space in the space which it occupies and thus its existence over pole is a wrong statement 
 
        
             
        
        
        
Acute stress reaction results from experiencing an extremely difficult incident and has signs that occur immediately or shortly after the incident.
Acute stress reaction results from exposure to high-stress conditions. The signs and symptoms appear immediately or shortly after the incidence has happened and involves changes or reactions in physical, cognitive, behavioral and psychological functions.
The common symptoms that appear are anxiety, irritability, loss of appetite, depression, exhaustion, lack of energy etc.
 
        
             
        
        
        
water filtration systems work by capturing undesirable elements in the water and allowing only clean water through. Water filtration systems for residential use that use actual filters, such as the thin film composite in reverse osmosis, do this by using microscopic pores that block even small bacteria while letting water through. Others work through other materials such as activated carbon or sand, which essentially scrubs the water clean.