Though there is no outside input, genetic mutations can still occur and change the gene pool over time.
Species is<em> </em><em>homo</em><em> </em><em>s</em><em>a</em><em>p</em><em>i</em><em>e</em><em>n</em><em>s</em>.
Genus is <em>homo</em>.
Answer:
5. infested elm bark beetles
Explanation:
Research publication (TERRY A. TATTAR, in Diseases of Shade Trees (Revised Edition), 1989) provided the detail on Dutch elm disease. According to researcher it is caused by <em>Ceratocystis ulmi</em> (fungus). Elm bark beetles carry this fungus from infected wood to the healthy wood.
