Your answer would be The microorganism was unicellular and had a well-defined nucleus.
        
             
        
        
        
Stratification in the field of ecology refers to the vertical layering of a habitat; the arrangement of vegetation in layers. ... strata) of vegetation largely according to the different heights to which their plants grow. The individual layers are inhabited by different animal and plant communities (stratozones).
        
                    
             
        
        
        
Answer: You can consult:
When there are three or more leaves growing from each node, the arrangement is called whorled. Plants such as the dandelion that have cluster of leaves growing around the base of the plant are said to have rosette arrangement.
Explanation:
I'm not sure but hope it helps.
 
        
             
        
        
        
The type of communication style that someone would have if they worry about the thoughts and feelings of others rather than their own is passive.
C. passive
<u>Explanation:</u>
4 main communication styles are passive, aggressive, passive-aggressive and assertive. People with a passive communication style find it difficult to express themselves. They usually have the fear that their feelings won’t b respected and tend to behave in a way by considering the feelings of other people while ignoring their own.
Lack of eye contact,  poor body gesture etc are the signs of passive communication. The lack of ability to communicate outward often results in passive communicator’s getting misunderstood.
 
        
             
        
        
        
Answer:
The nucleus (On the image, it's the sphere in the middle)