Each cell is alive even if it is part of a multi celled body, and all living organisms consist of one or more cells. Also, cells reproduce by dividing so it follows that all existing cells must have arisen by division of other cells. As a cell divides it passes it hereditary material- its DNA- to offspring.
        
             
        
        
        
The observable traits expressed by an organism are referred to as its phenotype. An organism's underlying genetic makeup, consisting of both physically visible and non-expressed alleles, is called its genotype.
 
        
             
        
        
        
<u>Human activity</u>. The sixth mass extinction of of organisms caused by human actions potentially could go as far back as the late Pleistocene era (over 12,000 years ago.)
 
        
             
        
        
        
Answer:
c. 0.026
Explanation:
Suppose the population is in Hardy-Weinberg equilibrium. According to it,
p + q = 1
p² + 2pq + q² = 1
where p= frequency of dominant allele
q = frequency of recessive allele
p² = frequency of homozygous dominant genotype
q² = frequency of homozygous recessive genotype
2pq = frequency of heterozygous genotype
Here, q = w = 0.84
p = W = 1 -w = 1- 0.84= 0.16
W² = 0.16 * 0.16 = 0.0256 = 0.026
Hence, frequency of the homozygous dominant genotype = 0.026