I think the correct answer from the choices listed above is option B. The geologic time scale originally ordered earth's rocks by relative age. The principle is that in a sequence of undeformed sedimentary rocks the oldest beds are at the bottom and the youngest ones are at the top.
        
             
        
        
        
I think it would be ovulation 
 
        
             
        
        
        
Answer:
To obtain a view of an individual's karyotype, cytologists photograph the chromosomes and then cut and paste each chromosome into a chart, or karyogram, also known as an ideogram. In a given species, chromosomes can be identified by their number, size, centromere position, and banding patter
Explanation:
 
        
             
        
        
        
Answer:
False 
Explanation:
Viscosity is a property of liquid that has resistance between liquid molecules. Those liquids having strong force of attraction between their particles has a viscosity whereas those liquid substances have weak intermolecular force of attraction between the particles has low viscosity. For example, water has low viscosity as compared to honey. 
 
        
             
        
        
        
 extinct organisms; that is, they belong to species that are no longer living anywhere on Earth. (3) The kinds of fossils found in rocks of different ages differ because life on Earth has changed through time.