Darwin on his vogage to Galapagos Islands had observed finches having different varieties of beaks. Write the explanation he have for his observations and conclusions he arrived a

On galapagos island Darwin observed variation in beaks of birds (Dawrin's finches) and he concluded :

On which islands Darwin observed many varieties of finches

Assertion: Darwin's finches of Galapagos islands have different types of modified beaks according to their food habits. Reason: Adaptive radiation, leads to development of different functional structure from a common ancestral form.

A student performed the experiment of glass slab and with different angles of incidence measured the angles of refraction and emergence in each case. He then recorded his observations as given in the table. The correct observation is :

He and his friend ____ arrived. (has/have)