Bone canaliculi are microscopic canals between the lacunae of ossified bone. The radiating processes of the osteocytes (called filopodia) project into these canals. These cytoplasmic processes are joined together by gap junctions. ... In cartilage, the lacunae and hence, the chondrocytes, are isolated from each other.
 
        
             
        
        
        
Answer:
availability of resources.
Explanation:
Availability of resources is abiotic factor which is responsible for the decrease in population in 1990 because when the population reaches its carrying capacity so the organisms compete with each other and due to limited resources such as food etc the decrease occurs in population. Infection is also occurs when there is high population due to which death occurs and population of organism decreases.
 
        
             
        
        
        
Answer:
The correct answer would be D)  tissue.
In biology, the level of organisation from simplest to complex level can be summarized as:
Organelles → cells → tissues → organs → organ systems → organisms → populations →communities → ecosystem → biosphere.
It is clear that tissue is organization level that exists between cells and organs.
When similar cells are assembled together to perform specific function, the assembly or this organization is said to be the tissue. 
There can be different types of tissues such as muscle tissue, nerve tissue et cetera.
Similarly, tissues arrange themselves to carry out specific function in the form of organ.
For example, heart is made up of cardiac tissue.
 
        
                    
             
        
        
        
Answer:
Gene mutation is most likely the cause of this difference from the rest of the population. Log in for more information.
Explanation:
CAN I GET BRAINLIEST
 
        
             
        
        
        
Sixty-five percent of the mass of bone<span> is an </span>organic<span> compound called hydroxyapatite. All </span>bones<span> formed by intramembranous ossification are irregular</span>bones<span>.
TRUE</span>