One of mendel's laws of inheritance. this law states an organism has two different alleles for a trait and the allele that is expressed in the phenotype, masking the expression of the other allele, is said to be dominant. the allele whose expression is masked is said to be recessive. this is

Law  of Dominance

Explanation:

The dominant trait  dominates or prevents the expression of the recessive trait. Dominant trait and recessive trait are represented by a capital and a small letter respectively. A dominant trait like round is seed, for example is represented by letter R and a recessive trait like wrinkled seed is represented by small letter r.

answer; ///i believe that the correct answer is (a) specialized cells)

the organisms are not adapted to live in some communities or habitats.