Answer:
Option 1, 2, 5
Explanation:
Options for the question 
- car a and car b are both moving toward the origin.
- car a and car b are moving in opposite directions.
- car a is moving faster than car b.
- car a and car b started at the same location.
- car a and car b pass each other at the crossover  point on the graph.  time (s)
Solution - 
The motion of any object is represented by  position-time In such graphs the position of an object is fixed for any starting point on the y-axis and time on the x-axis. 
The slope of such curves determine the velocity of the object at all its position within the graph. The steeper the slope is, the faster the the object is moving.
Hence, the following statements are correct
Option 1, 2, 5
 
        
             
        
        
        
Answer: Option A 
Explanation:
The hypothesis states that the lizards living in different regions belong to the different food preferences.
No, the hypothesis will be proved correct only when the lizards will be kept in the same condition then their food preferences will be studied.
If their food preference will still be the same then it can be concluded that they reflect parental food preferences.
Else, if they will feed on the food given to them then the hypothesis will be rejected. 
 
        
             
        
        
        
Catalyst maybe ( lower activation energy).
        
             
        
        
        
Answer: 26.75 meters.
2πr = 84
2 * 3.14 * radius = 84
radius = 84/6.28
r= 13.375 
So the diameter will be 13.375 + 13.375 which is 26.75 meters.
 
        
             
        
        
        
This would be the nucleiod region.