Answer:
A punnet square can be described as a diagram which is made to check the outcomes of a cross. 
To check the probability of the offsprings of a cross between homozygous dominant thumb shape parent with a homozygous recessive thumb shape parent, let's draw a punnet square:  
         t              t
T    Tt            Tt
T    Tt            Tt
The results of the punnet square depict that:
Genotype: All of the offsprings will be heterozygous for the thumb shape trait. Tt will be the genotype.
Phenotype: All of the offsprings will show the thumb shape like the thumb shape of the dominant parent. 
 
        
             
        
        
        
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>
        
             
        
        
        
Answer:
She is using Karyotyping
Explanation:
A karyotype is the number and visual appearance of the chromosomes in the cell nuclei of an organism or species.
 
        
                    
             
        
        
        
Answer: Option D 
Explanation:
The bacteria can undergo cell differentiation in response to the environmental conditions.
The oxidative stress, antibiotic exposure, stress conditions are some of the external conditions due to which the bacterial cell can respond in the cell differentiation.
The bacterial species can divide based in the conditions in which they are put. So it is true that under stress conditions the bacterial cell can undergo cell differentiation.
 
        
             
        
        
        
I think the answer is A
Hope this helps have a good night!