Which one of the following describes correctly the homologous structures?

1. Organs appearing only in embryonic stage and disappearing later in the adult

2. Organs with anatomical similarities, but performing different functions

3. Organs with anatomical dissimilarities, but performing same functions

4. Organs that have no function now, but had an important function in ancestors

The early-stage human embryo distinctly possesses

1. gills                             

2. gill slits

3. external ear (pinna)       

4. eyebrows                             

The embryological support for evolution was disproved by whose keen observations?

Embryological support for evolution was proposed by

(1) Ernst Heckel

(2) Karl Ernst von Baer

(3) Charles Darwin

(4) Alfred Wallace