Question

The physical appearance of an individual is known as
A. Heterotype
B. Genotype
C. Morphotype
D. Phenotype

Answer 1

Hint: Physical appearance of an individual is the outside look of an individual which tells us the structure and shape of an individual. There are various physical appearances between two individuals of the same species.

Complete answer:
Heterotype is a word used to distinguish between two individuals. This word is used to refer to two substances or individuals which are of different types.
Genotype is a collection of genes of an individual as it refers to the two alleles inherited for a particular gene. When information encoded in DNA is used to make protein and RNA molecules, the genotype is expressed in this situation.
Morphotype is a term used to refer to any group of different types of individuals which are of the same species in a population. This includes the individuals that belong to the same species but differ in their behavior and characters.
A phenotype is a term used to define the composite of an organism’s characteristics which can be observed which includes morphology, biochemical, development or physiological appearance, behavior and phenology. This type of appearance helps in defining the complete structure of an individual from outside.

Hence, the correct option is D. Phenotype.

Note: A phenotype character of an individual can be the result of its environmental influence upon genes which lead to changes in the appearance of an individual. As the organism lives in an environment, its body makes necessary changes which result in change of its phenotypic characters and appearance.