Questions

In biology, Homology is defined as any characteristic of biological organisms that is derived from a common ancestor. 

Hence, Homology is evidence of Common ancestry.

Proxima Centauri is the nearest star to the Earth.

Ctrl + F is a shorcut keyword and it is used for searching the word you want in the large document in the M.S. Word.

Magma is molten rocks beneath the earth's crust. Hot springs are heated geothermally by underlying magma.

The oxygenated blood  flows through pulmonary veins then leaves the lungs, which return it to the left heart, completing the pulmonary cycle.