Biological transmission differs from mechanical transmission in that biological transmission involves reproduction of a pathogen in an arthropod vector prior to transmission. works only with noncommunicable diseases. requires direct contact. occurs when a pathogen is carried on the feet of an insect. involves fomites

Biological transmission involves reproduction of pathogens in an arthropod vector prior to transmission. In terms of epidemiology, we can term a vector as an organism that is from infected to the uninfected. An infected organism which develops biological vector passes it to its host. For example a mosquito.

 A mosquito being a mechanical vector carries an infected organism to its host either through the legs or through the other body parts 

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

the correct answer in apex is tissue development, i know because i just had this question