DNA gets compact only during cell division and are called chromosomes. On other conditons, it forms a network of thin threads called  chromatin network.
        
             
        
        
        
Explanation: 
An autoimmune disorder occurs when the body sees it's own cells as foreign antigens and begins to attack them.
The treatment depends on the particular autoimmune disorder; however, the mainstay of treatment is the use of IMMUNOSUPPRESSIVE MEDICATION. Examples include corticosteroids (such as prednisone) and nonsteroid drugs such as azathioprine, cyclophosphamide, mycophenolate, sirolimus, or tacrolimus. 
 
        
             
        
        
        
The answer to this would be D: physical components of the environment, such as rocks and sand. The word "biotic" mean all the living organisms within an ecosystem such as plants and animals.
 
        
                    
             
        
        
        
Answer:
1.ans Phylogenetic Trees
Scientists use a tool called a phylogenetic tree to show the evolutionary pathways and connections among organisms. A phylogenetic tree is a diagram used to reflect evolutionary relationships among organisms or groups of organisms.
2.ans Binomial Nomenclature Rules
The entire two-part name must be written in italics (or underlined when handwritten). The genus name is always written first. The genus name must be capitalized. The specific epithet is never capitalized
3.ans Dichotomous Key
A dichotomous key is a tool created by scientists to help scientists and laypeople identify objects and organisms. Typically, a dichotomous key for identifying a particular type of object consists of a specific series of questions.
 
        
             
        
        
        
10kg mass and a 10kg mass at 10km apart