Population density is the number of individuals per unit area. To calculate the population density, number of individuals is divided by the size of the area. Therefore, in the given question Population Density = Number of mice / garden area. The number of mice is 168 and area of the garden is 12×7 = 84 square meter. Thus, population density of mice = 168/ 84 = 2
 
        
                    
             
        
        
        
Answer:
The concept includes every species of bacteria, virus, plant, fungi, and animal, as well as the diversity of genetic material within each species. It also encompasses the diverse ecosystems the species make up and the ongoing evolutionary processes that keep them functioning and adapting.
Explanation:
 
        
                    
             
        
        
        
Answer:
Option C
Explanation:
Granite is composed of coarse-grained quartz and feldspars in varying proportions and due to the varying proportions of these two constituent materials, the texture of granite varies as shown in the image. 
Thus, option C is correct 
Options A and B  and D are incorrect because the constituent material of granite is not fixed. It  varies from from place to the  other. 
 
        
             
        
        
        
Answer:
Types of Green Technology used in our home are the following. 
1) Solar panels 
2) Electric Microwave 
3) Electric heater 
4) Washing machine 
Explanation: 
Green Technology is a type of technology in which those materials are used which doesn't cause pollution in our environment. Solar panel, Electric Microwave, Electric heater and Washing machine are the examples of green technology because these machines does not pollute the environment.