genes..
anatomy
Phenotype
the appearance of an organism is it's phenotype
An organism's physical appearance is its phenotype. This is distinct from its genetic makeup, called its genotype.
PhenotypePhenotype
Internal is inside the organism External is the surroundings and stuff that happens outside the organism
External digestion is when enzymes are secreted to digest food outside of the organism. Then the soluble nutrients are absorbed by the organism.
Without knowing what the outside influence is, it's not known how it will change the appearance of an organism. There are many different influences which could possibly change the appearance of an organism, depending on what the organism is.
Genr
An organism's physical appearance is its phenotype. This is distinct from its genetic makeup, called its genotype.
An external parasite is an organism that lives on another organism. The external parasite depends on its host for food and shelter while the host is usually harmed.
Phenotype